
From laura.liess.dt@googlemail.com  Wed Aug  1 05:38:09 2012
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Date: Wed, 1 Aug 2012 14:38:06 +0200
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From: Laura Liess <laura.liess.dt@googlemail.com>
To: Marc Linsner <mlinsner@cisco.com>
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Subject: Re: [Ecrit] Rough location vs. HELD extension for Germany and ETSI
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Hi Mark,


> I was thinking about the case where a UA from another country, like the
> USA, roams into Germany and uses a VSP that is not part of the German
> domain of VSPs?  (not part of the German domain of VSPs = doesn't
> understand the unique German procedure(s))

This is exactly the reason why we brought up this proposal, as a trial
to achieve worldwide interoperability.   But  there is no regulatory
requirement for worldwide emergency calls,   it's just "nice to have".

We have two alternatives for what happens in your use case, depending
on how Ecrit deals with the new proposal:

1) The architecture proposal is accepted in ecrit as an alternative.
HELD is extended to return the ESRP URI and  the phonepcb is extended,
too. So, the US VSPs support these architecture and HELD extenssion
and the emergency calling would work for them in Germany/EU .

2) The architecture proposal  and HELD extenssion are rejected in
ecrit, they are valid just for Germany/ EU.  In this case any VSP
which have an SLA with a German VoIP carrier will have to support the
German architecture and HELD extenssion per regulatory requirements.
If the VSP does not support the German/EU procedure, the emergency
calling will not work. As I said, nobody cares about it.

Note: DT already submitted the proposal to TISPAN . We think some
other EU carriers which have the same problem in their country, our
and their SIP vendors and the German regulator will support this
proposal. Maybe other countries without dedicated emergency calling
infrastruchture and budget as US  will follow this model because it
minimizes the costs and implementation time.

Thanks a lot
Laura





>
> Thanks,
>
> -Marc-
>
>

From brian.rosen@neustar.biz  Thu Aug  9 08:42:33 2012
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From: "Rosen, Brian" <Brian.Rosen@neustar.biz>
To: "ecrit@ietf.org Org" <ecrit@ietf.org>
Date: Thu, 9 Aug 2012 11:42:18 -0400
Thread-Topic: comment field in additional-data
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Would there be any objection to adding a field in the service provider info=
 block for a comment?
I'm asking because we found a backwards compatibility issue in NENA, but I =
think it's generally useful.  There are always a couple of things it may be=
 helpful to tell the call taker (human).  I'd put cautionary text in that s=
uggests using an extension mechanism to pass actual data intended to be con=
sumed by an automaton.  This is just for free text to be displayed to a cal=
l taker or other PSAP staff.



From mserra@ravemobilesafety.com  Thu Aug  9 14:28:44 2012
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From: Matt Serra <mserra@ravemobilesafety.com>
To: "Rosen, Brian" <Brian.Rosen@neustar.biz>, "ecrit@ietf.org Org" <ecrit@ietf.org>
Date: Thu, 9 Aug 2012 16:28:19 -0500
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Brian -=20

No objection, but a question:

We mentioned possibly putting this field into the PIDF instead.  Did we arr=
ive on putting this into the Add'l Call Data to keep the PIDF "clean" assum=
ing it has no alternate use outside of 9-1-1?

I suspect the driver is also based on whether the "Comment" is related to t=
he address, or the provider/service as well.

Thanks.

-----Original Message-----
From: Rosen, Brian [mailto:Brian.Rosen@neustar.biz]=20
Sent: Thursday, August 09, 2012 11:42 AM
To: ecrit@ietf.org Org
Subject: [Ecrit] comment field in additional-data

Would there be any objection to adding a field in the service provider info=
 block for a comment?
I'm asking because we found a backwards compatibility issue in NENA, but I =
think it's generally useful.  There are always a couple of things it may be=
 helpful to tell the call taker (human).  I'd put cautionary text in that s=
uggests using an extension mechanism to pass actual data intended to be con=
sumed by an automaton.  This is just for free text to be displayed to a cal=
l taker or other PSAP staff.




From brian.rosen@neustar.biz  Thu Aug  9 15:30:50 2012
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From: "Rosen, Brian" <Brian.Rosen@neustar.biz>
To: Matt Serra <mserra@ravemobilesafety.com>
Date: Thu, 9 Aug 2012 18:30:47 -0400
Thread-Topic: [Ecrit] comment field in additional-data
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Cc: "Rosen, Brian" <Brian.Rosen@neustar.biz>, "ecrit@ietf.org Org" <ecrit@ietf.org>
Subject: Re: [Ecrit] comment field in additional-data
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Well, I think we want entities other than an access network to be able to u=
se a comment, so the latter of your two answers is what I would say.

If there is a comment in additional-data, I don't think we need another in =
PIDF.

Brian

On Aug 9, 2012, at 5:28 PM, Matt Serra <mserra@ravemobilesafety.com> wrote:

> Brian -=20
>=20
> No objection, but a question:
>=20
> We mentioned possibly putting this field into the PIDF instead.  Did we a=
rrive on putting this into the Add'l Call Data to keep the PIDF "clean" ass=
uming it has no alternate use outside of 9-1-1?
>=20
> I suspect the driver is also based on whether the "Comment" is related to=
 the address, or the provider/service as well.
>=20
> Thanks.
>=20
> -----Original Message-----
> From: Rosen, Brian [mailto:Brian.Rosen@neustar.biz]=20
> Sent: Thursday, August 09, 2012 11:42 AM
> To: ecrit@ietf.org Org
> Subject: [Ecrit] comment field in additional-data
>=20
> Would there be any objection to adding a field in the service provider in=
fo block for a comment?
> I'm asking because we found a backwards compatibility issue in NENA, but =
I think it's generally useful.  There are always a couple of things it may =
be helpful to tell the call taker (human).  I'd put cautionary text in that=
 suggests using an extension mechanism to pass actual data intended to be c=
onsumed by an automaton.  This is just for free text to be displayed to a c=
all taker or other PSAP staff.
>=20
>=20
>=20
> _______________________________________________
> Ecrit mailing list
> Ecrit@ietf.org
> https://www.ietf.org/mailman/listinfo/ecrit


From RMarshall@telecomsys.com  Tue Aug 14 13:15:06 2012
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As an outcome of the Vancouver ECRIT meeting for the -psap-callback draft, =
the group discussed the use of the Privacy header field value as something =
that was meant to indicate a PSAP callback.

Now we need to verify what the decisions were concerning that value, and it=
s use - on the list:

Resolve to use "emergency" as the Private header value, since any new (othe=
r) value doesn't offer a real advantage.

Does anyone disagree as to wg acceptance of this approach in the meeting?

We need to move this draft forward for use in 3GPP.

Link to draft: http://tools.ietf.org/html/draft-ietf-ecrit-psap-callback-04
Link to minutes: http://www.ietf.org/proceedings/84/minutes/minutes-84-ecrit


-roger marshall.

CONFIDENTIALITY NOTICE: The information contained in this message may be pr=
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<div class=3D"WordSection1">
<p class=3D"MsoNormal">As an outcome of the Vancouver ECRIT meeting for the=
 &#8211;psap-callback draft, the group discussed the use of the Privacy hea=
der field value as something that was meant to indicate a PSAP callback.&nb=
sp;
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Now we need to verify what the decisions were concer=
ning that value, and its use - on the list:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Resolve to use &#8220;emergency&#8221; as the Privat=
e header value, since any new (other) value doesn&#8217;t offer a real adva=
ntage.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Does anyone disagree as to wg acceptance of this app=
roach in the meeting?<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">We need to move this draft forward for use in 3GPP.<=
o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Link to draft: <a href=3D"http://tools.ietf.org/html=
/draft-ietf-ecrit-psap-callback-04">
http://tools.ietf.org/html/draft-ietf-ecrit-psap-callback-04</a><o:p></o:p>=
</p>
<p class=3D"MsoNormal">Link to minutes: <a href=3D"http://www.ietf.org/proc=
eedings/84/minutes/minutes-84-ecrit">
http://www.ietf.org/proceedings/84/minutes/minutes-84-ecrit</a><o:p></o:p><=
/p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">-roger marshall.<o:p></o:p></p>
</div>
<p><span style=3D"font-family:'Arial';font-size:8pt;">CONFIDENTIALITY NOTIC=
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From pkyzivat@alum.mit.edu  Tue Aug 14 13:31:18 2012
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Date: Tue, 14 Aug 2012 16:31:16 -0400
From: Paul Kyzivat <pkyzivat@alum.mit.edu>
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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I prefer using "emergency", and would be ok with using some new value.

There was some concern expressed at the meeting that "emergency" might 
already be in use for some other, incompatible, situation. I'm inclined 
to think that unlikely, but it may be hard to determine.

If I understood the discussion, it was that for emergency callback the 
presence of the indication should allow to call to complete even in the 
presence of call barring (e.g. service suspended for non-payment). And 
there was then desire to limit who could use the indicator. Presumably 
the SP could filter out "Priority:emergency" except when received from a 
PSAP. But that would mean that other uses of "Priority:emergency" might 
break.

Perhaps the first question in this regard is whether those that would be 
doing this sort of filtering *currently* allow Priority:emergency or if 
they *already* filter it. (E.g. via an SBC.)

For those that don't have the problem with call barring, I think this 
new usage and any existing usage could coexist. So this might just be a 
question for IMS implementers to investigate.

	Thanks,
	Paul

On 8/14/12 4:14 PM, Roger Marshall wrote:
> As an outcome of the Vancouver ECRIT meeting for the –psap-callback
> draft, the group discussed the use of the Privacy header field value as
> something that was meant to indicate a PSAP callback.
>
> Now we need to verify what the decisions were concerning that value, and
> its use - on the list:
>
> Resolve to use “emergency” as the Private header value, since any new
> (other) value doesn’t offer a real advantage.
>
> Does anyone disagree as to wg acceptance of this approach in the meeting?
>
> We need to move this draft forward for use in 3GPP.
>
> Link to draft: http://tools.ietf.org/html/draft-ietf-ecrit-psap-callback-04
>
> Link to minutes: http://www.ietf.org/proceedings/84/minutes/minutes-84-ecrit
>
> -roger marshall.
>
> CONFIDENTIALITY NOTICE: The information contained in this message may be
> privileged and/or confidential. If you are not the intended recipient,
> or responsible for delivering this message to the intended recipient,
> any review, forwarding, dissemination, distribution or copying of this
> communication or any attachment(s) is strictly prohibited. If you have
> received this message in error, please notify the sender immediately,
> and delete it and all attachments from your computer and network.
>
>
>
> _______________________________________________
> Ecrit mailing list
> Ecrit@ietf.org
> https://www.ietf.org/mailman/listinfo/ecrit


From christer.holmberg@ericsson.com  Tue Aug 14 13:51:17 2012
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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Paul Kyzivat <pkyzivat@alum.mit.edu>, "ecrit@ietf.org" <ecrit@ietf.org>
Date: Tue, 14 Aug 2012 22:50:38 +0200
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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Hi,

So, if there is potential problem with "emergency", why not define a new va=
lue? As far as I remember, nobody objected to that.

Regards,

Christer

________________________________________
From: ecrit-bounces@ietf.org [ecrit-bounces@ietf.org] On Behalf Of Paul Kyz=
ivat [pkyzivat@alum.mit.edu]
Sent: Tuesday, August 14, 2012 11:31 PM
To: ecrit@ietf.org
Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator

I prefer using "emergency", and would be ok with using some new value.

There was some concern expressed at the meeting that "emergency" might
already be in use for some other, incompatible, situation. I'm inclined
to think that unlikely, but it may be hard to determine.

If I understood the discussion, it was that for emergency callback the
presence of the indication should allow to call to complete even in the
presence of call barring (e.g. service suspended for non-payment). And
there was then desire to limit who could use the indicator. Presumably
the SP could filter out "Priority:emergency" except when received from a
PSAP. But that would mean that other uses of "Priority:emergency" might
break.

Perhaps the first question in this regard is whether those that would be
doing this sort of filtering *currently* allow Priority:emergency or if
they *already* filter it. (E.g. via an SBC.)

For those that don't have the problem with call barring, I think this
new usage and any existing usage could coexist. So this might just be a
question for IMS implementers to investigate.

        Thanks,
        Paul

On 8/14/12 4:14 PM, Roger Marshall wrote:
> As an outcome of the Vancouver ECRIT meeting for the =96psap-callback
> draft, the group discussed the use of the Privacy header field value as
> something that was meant to indicate a PSAP callback.
>
> Now we need to verify what the decisions were concerning that value, and
> its use - on the list:
>
> Resolve to use =93emergency=94 as the Private header value, since any new
> (other) value doesn=92t offer a real advantage.
>
> Does anyone disagree as to wg acceptance of this approach in the meeting?
>
> We need to move this draft forward for use in 3GPP.
>
> Link to draft: http://tools.ietf.org/html/draft-ietf-ecrit-psap-callback-=
04
>
> Link to minutes: http://www.ietf.org/proceedings/84/minutes/minutes-84-ec=
rit
>
> -roger marshall.
>
> CONFIDENTIALITY NOTICE: The information contained in this message may be
> privileged and/or confidential. If you are not the intended recipient,
> or responsible for delivering this message to the intended recipient,
> any review, forwarding, dissemination, distribution or copying of this
> communication or any attachment(s) is strictly prohibited. If you have
> received this message in error, please notify the sender immediately,
> and delete it and all attachments from your computer and network.
>
>
>
> _______________________________________________
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> https://www.ietf.org/mailman/listinfo/ecrit

_______________________________________________
Ecrit mailing list
Ecrit@ietf.org
https://www.ietf.org/mailman/listinfo/ecrit=

From pkyzivat@alum.mit.edu  Tue Aug 14 14:20:01 2012
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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On 8/14/12 4:50 PM, Christer Holmberg wrote:
> Hi,
>
> So, if there is potential problem with "emergency", why not define a new value? As far as I remember, nobody objected to that.

As I said, I'm *ok* with a new value.
But it offends me to have to add a new value when we already have a 
value "emergency" and this *is* an emergency. It sets a precedent that 
nobody can use predefined values that weren't assigned for their own 
specific case. Its another example of a philosophy that we need to 
signal features or use cases rather than simply assemble basic 
primitives to accomplish features.

	Thanks,
	Paul

> Regards,
>
> Christer
>
> ________________________________________
> From: ecrit-bounces@ietf.org [ecrit-bounces@ietf.org] On Behalf Of Paul Kyzivat [pkyzivat@alum.mit.edu]
> Sent: Tuesday, August 14, 2012 11:31 PM
> To: ecrit@ietf.org
> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>
> I prefer using "emergency", and would be ok with using some new value.
>
> There was some concern expressed at the meeting that "emergency" might
> already be in use for some other, incompatible, situation. I'm inclined
> to think that unlikely, but it may be hard to determine.
>
> If I understood the discussion, it was that for emergency callback the
> presence of the indication should allow to call to complete even in the
> presence of call barring (e.g. service suspended for non-payment). And
> there was then desire to limit who could use the indicator. Presumably
> the SP could filter out "Priority:emergency" except when received from a
> PSAP. But that would mean that other uses of "Priority:emergency" might
> break.
>
> Perhaps the first question in this regard is whether those that would be
> doing this sort of filtering *currently* allow Priority:emergency or if
> they *already* filter it. (E.g. via an SBC.)
>
> For those that don't have the problem with call barring, I think this
> new usage and any existing usage could coexist. So this might just be a
> question for IMS implementers to investigate.
>
>          Thanks,
>          Paul
>
> On 8/14/12 4:14 PM, Roger Marshall wrote:
>> As an outcome of the Vancouver ECRIT meeting for the –psap-callback
>> draft, the group discussed the use of the Privacy header field value as
>> something that was meant to indicate a PSAP callback.
>>
>> Now we need to verify what the decisions were concerning that value, and
>> its use - on the list:
>>
>> Resolve to use “emergency” as the Private header value, since any new
>> (other) value doesn’t offer a real advantage.
>>
>> Does anyone disagree as to wg acceptance of this approach in the meeting?
>>
>> We need to move this draft forward for use in 3GPP.
>>
>> Link to draft: http://tools.ietf.org/html/draft-ietf-ecrit-psap-callback-04
>>
>> Link to minutes: http://www.ietf.org/proceedings/84/minutes/minutes-84-ecrit
>>
>> -roger marshall.
>>
>> CONFIDENTIALITY NOTICE: The information contained in this message may be
>> privileged and/or confidential. If you are not the intended recipient,
>> or responsible for delivering this message to the intended recipient,
>> any review, forwarding, dissemination, distribution or copying of this
>> communication or any attachment(s) is strictly prohibited. If you have
>> received this message in error, please notify the sender immediately,
>> and delete it and all attachments from your computer and network.
>>
>>
>>
>> _______________________________________________
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>> https://www.ietf.org/mailman/listinfo/ecrit
>
> _______________________________________________
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From keith.drage@alcatel-lucent.com  Wed Aug 15 06:13:39 2012
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From: "DRAGE, Keith (Keith)" <keith.drage@alcatel-lucent.com>
To: Christer Holmberg <christer.holmberg@ericsson.com>, Paul Kyzivat <pkyzivat@alum.mit.edu>, "ecrit@ietf.org" <ecrit@ietf.org>
Date: Wed, 15 Aug 2012 15:13:32 +0200
Thread-Topic: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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I would prefer a new value.

This is essentially a new defined usage, and it is unlikely that current us=
e is being made of any existing codepoints for this usage.

Given that, I see no need to try and investigate whether we can reuse an ex=
isting codepoint, which may well be used for all sorts of other purposes.

Keith

> -----Original Message-----
> From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On Behalf Of
> Christer Holmberg
> Sent: 14 August 2012 21:51
> To: Paul Kyzivat; ecrit@ietf.org
> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>=20
> Hi,
>=20
> So, if there is potential problem with "emergency", why not define a new
> value? As far as I remember, nobody objected to that.
>=20
> Regards,
>=20
> Christer
>=20
> ________________________________________
> From: ecrit-bounces@ietf.org [ecrit-bounces@ietf.org] On Behalf Of Paul
> Kyzivat [pkyzivat@alum.mit.edu]
> Sent: Tuesday, August 14, 2012 11:31 PM
> To: ecrit@ietf.org
> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>=20
> I prefer using "emergency", and would be ok with using some new value.
>=20
> There was some concern expressed at the meeting that "emergency" might
> already be in use for some other, incompatible, situation. I'm inclined
> to think that unlikely, but it may be hard to determine.
>=20
> If I understood the discussion, it was that for emergency callback the
> presence of the indication should allow to call to complete even in the
> presence of call barring (e.g. service suspended for non-payment). And
> there was then desire to limit who could use the indicator. Presumably
> the SP could filter out "Priority:emergency" except when received from a
> PSAP. But that would mean that other uses of "Priority:emergency" might
> break.
>=20
> Perhaps the first question in this regard is whether those that would be
> doing this sort of filtering *currently* allow Priority:emergency or if
> they *already* filter it. (E.g. via an SBC.)
>=20
> For those that don't have the problem with call barring, I think this
> new usage and any existing usage could coexist. So this might just be a
> question for IMS implementers to investigate.
>=20
>         Thanks,
>         Paul
>=20
> On 8/14/12 4:14 PM, Roger Marshall wrote:
> > As an outcome of the Vancouver ECRIT meeting for the -psap-callback
> > draft, the group discussed the use of the Privacy header field value as
> > something that was meant to indicate a PSAP callback.
> >
> > Now we need to verify what the decisions were concerning that value, an=
d
> > its use - on the list:
> >
> > Resolve to use "emergency" as the Private header value, since any new
> > (other) value doesn't offer a real advantage.
> >
> > Does anyone disagree as to wg acceptance of this approach in the
> meeting?
> >
> > We need to move this draft forward for use in 3GPP.
> >
> > Link to draft: http://tools.ietf.org/html/draft-ietf-ecrit-psap-
> callback-04
> >
> > Link to minutes: http://www.ietf.org/proceedings/84/minutes/minutes-84-
> ecrit
> >
> > -roger marshall.
> >
> > CONFIDENTIALITY NOTICE: The information contained in this message may b=
e
> > privileged and/or confidential. If you are not the intended recipient,
> > or responsible for delivering this message to the intended recipient,
> > any review, forwarding, dissemination, distribution or copying of this
> > communication or any attachment(s) is strictly prohibited. If you have
> > received this message in error, please notify the sender immediately,
> > and delete it and all attachments from your computer and network.
> >
> >
> >
> > _______________________________________________
> > Ecrit mailing list
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> > https://www.ietf.org/mailman/listinfo/ecrit
>=20
> _______________________________________________
> Ecrit mailing list
> Ecrit@ietf.org
> https://www.ietf.org/mailman/listinfo/ecrit
> _______________________________________________
> Ecrit mailing list
> Ecrit@ietf.org
> https://www.ietf.org/mailman/listinfo/ecrit

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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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On 14 August 2012 14:19, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
> As I said, I'm *ok* with a new value.
> But it offends me to have to add a new value when we already have a value
> "emergency" and this *is* an emergency. It sets a precedent that nobody can
> use predefined values that weren't assigned for their own specific case. Its
> another example of a philosophy that we need to signal features or use cases
> rather than simply assemble basic primitives to accomplish features.

I'm with Paul on this one.  These are just labels that have
essentially arbitrary or context-specific semantics.  This looks very
much like a case where context is everything.

"emergency" is the right word.  The only concern is that it might have
some other meaning.  But those uses are specifically in some other
context.  This is a new context (probably based on identification of
the PSAP, but that's simply an example).

If context provides insufficient information to enable the sorts of
decision that we want to enable, then a new label isn't going to fix
that.

From christer.holmberg@ericsson.com  Thu Aug 16 02:31:18 2012
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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Martin Thomson <martin.thomson@gmail.com>, Paul Kyzivat <pkyzivat@alum.mit.edu>
Date: Thu, 16 Aug 2012 11:28:25 +0200
Thread-Topic: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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Hi,

It is true that some entity in the network needs to verify the context, and=
 that the call comes from a PSAP. But, once that is done, other entities wi=
thin the same network (trust domain) do not need to do that.=20

So, for that reason I think a new value would be good.

Regards,

Christer

________________________________________
From: Martin Thomson [martin.thomson@gmail.com]
Sent: Wednesday, August 15, 2012 7:36 PM
To: Paul Kyzivat
Cc: Christer Holmberg; ecrit@ietf.org
Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator

On 14 August 2012 14:19, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
> As I said, I'm *ok* with a new value.
> But it offends me to have to add a new value when we already have a value
> "emergency" and this *is* an emergency. It sets a precedent that nobody c=
an
> use predefined values that weren't assigned for their own specific case. =
Its
> another example of a philosophy that we need to signal features or use ca=
ses
> rather than simply assemble basic primitives to accomplish features.

I'm with Paul on this one.  These are just labels that have
essentially arbitrary or context-specific semantics.  This looks very
much like a case where context is everything.

"emergency" is the right word.  The only concern is that it might have
some other meaning.  But those uses are specifically in some other
context.  This is a new context (probably based on identification of
the PSAP, but that's simply an example).

If context provides insufficient information to enable the sorts of
decision that we want to enable, then a new label isn't going to fix
that.=

From prvs=3575fc1088=jbakker@rim.com  Thu Aug 16 08:22:51 2012
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From: John-Luc Bakker <jbakker@rim.com>
To: "ecrit@ietf.org" <ecrit@ietf.org>
Thread-Topic: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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Date: Thu, 16 Aug 2012 15:22:45 +0000
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References: <FBD5AAFFD0978846BF6D3FAB4C892ACC0EB22C@SEA-EXMB-2.telecomsys.com> <502AB594.8000800@alum.mit.edu> <7F2072F1E0DE894DA4B517B93C6A05853408683666@ESESSCMS0356.eemea.ericsson.se> <502AC0FE.8040707@alum.mit.edu>, <CABkgnnXQBYxp10wcdDBATMb53vET5b_SQ+KdPkU2_MqSR=mRzg@mail.gmail.com> <7F2072F1E0DE894DA4B517B93C6A05853408683686@ESESSCMS0356.eemea.ericsson.se>
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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Hi Christer,

What you describe below is a trust domain applicable only to a particular he=
ader field's value, right? 
Are you saying only if the new value is present, the UA can derive that the=
 header field value can be trusted as it must have been "subjected to verifi=
cation" (any other value for that header field cannot be trusted)? 

I need to look deeper into trust domains, as I hadn't realized existing (leg=
acy?) header fields could be subjected to trust domain, based on that header=
 field's value.

I was so far leaning towards Martin's and Paul's position, where they claim=
 "emergency" is the right word.

Regards,

	John-Luc 

-----Original Message-----
From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On Behalf Of Ch=
rister Holmberg
Sent: Thursday, August 16, 2012 4:28 AM
To: Martin Thomson; Paul Kyzivat
Cc: ecrit@ietf.org
Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator

Hi,

It is true that some entity in the network needs to verify the context, and=
 that the call comes from a PSAP. But, once that is done, other entities wit=
hin the same network (trust domain) do not need to do that. 

So, for that reason I think a new value would be good.

Regards,

Christer

________________________________________
From: Martin Thomson [martin.thomson@gmail.com]
Sent: Wednesday, August 15, 2012 7:36 PM
To: Paul Kyzivat
Cc: Christer Holmberg; ecrit@ietf.org
Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator

On 14 August 2012 14:19, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
> As I said, I'm *ok* with a new value.
> But it offends me to have to add a new value when we already have a 
> value "emergency" and this *is* an emergency. It sets a precedent that 
> nobody can use predefined values that weren't assigned for their own 
> specific case. Its another example of a philosophy that we need to 
> signal features or use cases rather than simply assemble basic primitives=
 to accomplish features.

I'm with Paul on this one.  These are just labels that have essentially arbi=
trary or context-specific semantics.  This looks very much like a case where=
 context is everything.

"emergency" is the right word.  The only concern is that it might have some=
 other meaning.  But those uses are specifically in some other context.  Thi=
s is a new context (probably based on identification of the PSAP, but that's=
 simply an example).

If context provides insufficient information to enable the sorts of decision=
 that we want to enable, then a new label isn't going to fix that.
_______________________________________________
Ecrit mailing list
Ecrit@ietf.org
https://www.ietf.org/mailman/listinfo/ecrit

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From christer.holmberg@ericsson.com  Fri Aug 17 00:53:00 2012
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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: John-Luc Bakker <jbakker@rim.com>, "ecrit@ietf.org" <ecrit@ietf.org>
Date: Fri, 17 Aug 2012 09:52:02 +0200
Thread-Topic: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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Hi,

I am saying that if the value has been verified, other entities within the =
trust domain don't need to perform the verification. And, using a new value=
, those entities will also know that it is a PSAP callback.

Regards,

Christer

________________________________________
From: ecrit-bounces@ietf.org [ecrit-bounces@ietf.org] On Behalf Of John-Luc=
 Bakker [jbakker@rim.com]
Sent: Thursday, August 16, 2012 6:22 PM
To: ecrit@ietf.org
Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator

Hi Christer,

What you describe below is a trust domain applicable only to a particular h=
eader field's value, right?
Are you saying only if the new value is present, the UA can derive that the=
 header field value can be trusted as it must have been "subjected to verif=
ication" (any other value for that header field cannot be trusted)?

I need to look deeper into trust domains, as I hadn't realized existing (le=
gacy?) header fields could be subjected to trust domain, based on that head=
er field's value.

I was so far leaning towards Martin's and Paul's position, where they claim=
 "emergency" is the right word.

Regards,

        John-Luc

-----Original Message-----
From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On Behalf Of C=
hrister Holmberg
Sent: Thursday, August 16, 2012 4:28 AM
To: Martin Thomson; Paul Kyzivat
Cc: ecrit@ietf.org
Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator

Hi,

It is true that some entity in the network needs to verify the context, and=
 that the call comes from a PSAP. But, once that is done, other entities wi=
thin the same network (trust domain) do not need to do that.

So, for that reason I think a new value would be good.

Regards,

Christer

________________________________________
From: Martin Thomson [martin.thomson@gmail.com]
Sent: Wednesday, August 15, 2012 7:36 PM
To: Paul Kyzivat
Cc: Christer Holmberg; ecrit@ietf.org
Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator

On 14 August 2012 14:19, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
> As I said, I'm *ok* with a new value.
> But it offends me to have to add a new value when we already have a
> value "emergency" and this *is* an emergency. It sets a precedent that
> nobody can use predefined values that weren't assigned for their own
> specific case. Its another example of a philosophy that we need to
> signal features or use cases rather than simply assemble basic primitives=
 to accomplish features.

I'm with Paul on this one.  These are just labels that have essentially arb=
itrary or context-specific semantics.  This looks very much like a case whe=
re context is everything.

"emergency" is the right word.  The only concern is that it might have some=
 other meaning.  But those uses are specifically in some other context.  Th=
is is a new context (probably based on identification of the PSAP, but that=
's simply an example).

If context provides insufficient information to enable the sorts of decisio=
n that we want to enable, then a new label isn't going to fix that.
_______________________________________________
Ecrit mailing list
Ecrit@ietf.org
https://www.ietf.org/mailman/listinfo/ecrit

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From pkyzivat@alum.mit.edu  Fri Aug 17 08:38:30 2012
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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On 8/17/12 3:52 AM, Christer Holmberg wrote:
> Hi,
>
> I am saying that if the value has been verified, other entities within the trust domain don't need to perform the verification. And, using a new value, those entities will also know that it is a PSAP callback.

If you are working within a domain you can use whatever criteria you 
want to decide whether to preserve or remove this header when it comes 
across the boundary of the domain. If you want, the border elements can 
only permit it from PSAPs.

One it is inside the trust domain, it is what it is. If it's 
Priority:emergency, then that's what it is. Something inside the trust 
domain could have put it in. Or something on the boundary of the domain 
might have a different policy to let it in from some class of users 
other than PSAPs.

My point is that it is an emergency call, which might have a high 
probability of being an emergency callback from a PSAP. It isn't 
definitively an emergency callback. And then there needs to be a set of 
policies for how to handle emergency calls. That might include things 
like calling barred numbers that you don't want just anybody to be able 
to do.

Of course this is just a philosophical difference from what you said.

	Thanks,
	Paul

> Regards,
>
> Christer
>
> ________________________________________
> From: ecrit-bounces@ietf.org [ecrit-bounces@ietf.org] On Behalf Of John-Luc Bakker [jbakker@rim.com]
> Sent: Thursday, August 16, 2012 6:22 PM
> To: ecrit@ietf.org
> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>
> Hi Christer,
>
> What you describe below is a trust domain applicable only to a particular header field's value, right?
> Are you saying only if the new value is present, the UA can derive that the header field value can be trusted as it must have been "subjected to verification" (any other value for that header field cannot be trusted)?
>
> I need to look deeper into trust domains, as I hadn't realized existing (legacy?) header fields could be subjected to trust domain, based on that header field's value.
>
> I was so far leaning towards Martin's and Paul's position, where they claim "emergency" is the right word.
>
> Regards,
>
>          John-Luc
>
> -----Original Message-----
> From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On Behalf Of Christer Holmberg
> Sent: Thursday, August 16, 2012 4:28 AM
> To: Martin Thomson; Paul Kyzivat
> Cc: ecrit@ietf.org
> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>
> Hi,
>
> It is true that some entity in the network needs to verify the context, and that the call comes from a PSAP. But, once that is done, other entities within the same network (trust domain) do not need to do that.
>
> So, for that reason I think a new value would be good.
>
> Regards,
>
> Christer
>
> ________________________________________
> From: Martin Thomson [martin.thomson@gmail.com]
> Sent: Wednesday, August 15, 2012 7:36 PM
> To: Paul Kyzivat
> Cc: Christer Holmberg; ecrit@ietf.org
> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>
> On 14 August 2012 14:19, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
>> As I said, I'm *ok* with a new value.
>> But it offends me to have to add a new value when we already have a
>> value "emergency" and this *is* an emergency. It sets a precedent that
>> nobody can use predefined values that weren't assigned for their own
>> specific case. Its another example of a philosophy that we need to
>> signal features or use cases rather than simply assemble basic primitives to accomplish features.
>
> I'm with Paul on this one.  These are just labels that have essentially arbitrary or context-specific semantics.  This looks very much like a case where context is everything.
>
> "emergency" is the right word.  The only concern is that it might have some other meaning.  But those uses are specifically in some other context.  This is a new context (probably based on identification of the PSAP, but that's simply an example).
>
> If context provides insufficient information to enable the sorts of decision that we want to enable, then a new label isn't going to fix that.
> _______________________________________________
> Ecrit mailing list
> Ecrit@ietf.org
> https://www.ietf.org/mailman/listinfo/ecrit
>
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From: John-Luc Bakker <jbakker@rim.com>
To: "ecrit@ietf.org" <ecrit@ietf.org>
Thread-Topic: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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References: <FBD5AAFFD0978846BF6D3FAB4C892ACC0EB22C@SEA-EXMB-2.telecomsys.com> <502AB594.8000800@alum.mit.edu> <7F2072F1E0DE894DA4B517B93C6A05853408683666@ESESSCMS0356.eemea.ericsson.se> <502AC0FE.8040707@alum.mit.edu>, <CABkgnnXQBYxp10wcdDBATMb53vET5b_SQ+KdPkU2_MqSR=mRzg@mail.gmail.com> <7F2072F1E0DE894DA4B517B93C6A05853408683686@ESESSCMS0356.eemea.ericsson.se>, <155970D1DA8E174F9E46039E10E2AA351D94C4@XMB104ADS.rim.net> <7F2072F1E0DE894DA4B517B93C6A05853408683691@ESESSCMS0356.eemea.ericsson.se> <502E6573.80107@alum.mit.edu>
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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Folks,

Going back to the original question:

> Resolve to use "emergency" as the Private header value, since any new (oth=
er) value doesn't offer a real advantage.
>
> Does anyone disagree as to wg acceptance of this approach in the meeting?

I haven't understood the position against using "emergency". I am happy to u=
se "emergency" as the Private header value.

Kind regards,

	JL

-----Original Message-----
From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On Behalf Of Pa=
ul Kyzivat
Sent: Friday, August 17, 2012 10:38 AM
To: ecrit@ietf.org
Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator

On 8/17/12 3:52 AM, Christer Holmberg wrote:
> Hi,
>
> I am saying that if the value has been verified, other entities within the=
 trust domain don't need to perform the verification. And, using a new value=
, those entities will also know that it is a PSAP callback.

If you are working within a domain you can use whatever criteria you want to=
 decide whether to preserve or remove this header when it comes across the b=
oundary of the domain. If you want, the border elements can only permit it f=
rom PSAPs.

One it is inside the trust domain, it is what it is. If it's Priority:emerge=
ncy, then that's what it is. Something inside the trust domain could have pu=
t it in. Or something on the boundary of the domain might have a different p=
olicy to let it in from some class of users other than PSAPs.

My point is that it is an emergency call, which might have a high probabilit=
y of being an emergency callback from a PSAP. It isn't definitively an emerg=
ency callback. And then there needs to be a set of policies for how to handl=
e emergency calls. That might include things like calling barred numbers tha=
t you don't want just anybody to be able to do.

Of course this is just a philosophical difference from what you said.

	Thanks,
	Paul

> Regards,
>
> Christer
>
> ________________________________________
> From: ecrit-bounces@ietf.org [ecrit-bounces@ietf.org] On Behalf Of 
> John-Luc Bakker [jbakker@rim.com]
> Sent: Thursday, August 16, 2012 6:22 PM
> To: ecrit@ietf.org
> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>
> Hi Christer,
>
> What you describe below is a trust domain applicable only to a particular=
 header field's value, right?
> Are you saying only if the new value is present, the UA can derive that th=
e header field value can be trusted as it must have been "subjected to verif=
ication" (any other value for that header field cannot be trusted)?
>
> I need to look deeper into trust domains, as I hadn't realized existing (l=
egacy?) header fields could be subjected to trust domain, based on that head=
er field's value.
>
> I was so far leaning towards Martin's and Paul's position, where they clai=
m "emergency" is the right word.
>
> Regards,
>
>          John-Luc
>
> -----Original Message-----
> From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On Behalf 
> Of Christer Holmberg
> Sent: Thursday, August 16, 2012 4:28 AM
> To: Martin Thomson; Paul Kyzivat
> Cc: ecrit@ietf.org
> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>
> Hi,
>
> It is true that some entity in the network needs to verify the context, an=
d that the call comes from a PSAP. But, once that is done, other entities wi=
thin the same network (trust domain) do not need to do that.
>
> So, for that reason I think a new value would be good.
>
> Regards,
>
> Christer
>
> ________________________________________
> From: Martin Thomson [martin.thomson@gmail.com]
> Sent: Wednesday, August 15, 2012 7:36 PM
> To: Paul Kyzivat
> Cc: Christer Holmberg; ecrit@ietf.org
> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>
> On 14 August 2012 14:19, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
>> As I said, I'm *ok* with a new value.
>> But it offends me to have to add a new value when we already have a 
>> value "emergency" and this *is* an emergency. It sets a precedent 
>> that nobody can use predefined values that weren't assigned for their 
>> own specific case. Its another example of a philosophy that we need 
>> to signal features or use cases rather than simply assemble basic primiti=
ves to accomplish features.
>
> I'm with Paul on this one.  These are just labels that have essentially ar=
bitrary or context-specific semantics.  This looks very much like a case whe=
re context is everything.
>
> "emergency" is the right word.  The only concern is that it might have som=
e other meaning.  But those uses are specifically in some other context.  Th=
is is a new context (probably based on identification of the PSAP, but that'=
s simply an example).
>
> If context provides insufficient information to enable the sorts of decisi=
on that we want to enable, then a new label isn't going to fix that.
> _______________________________________________
> Ecrit mailing list
> Ecrit@ietf.org
> https://www.ietf.org/mailman/listinfo/ecrit
>
> ---------------------------------------------------------------------
> This transmission (including any attachments) may contain confidential inf=
ormation, privileged material (including material protected by the solicitor=
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n. Any use of this information by anyone other than the intended recipient i=
s prohibited. If you have received this transmission in error, please immedi=
ately reply to the sender and delete this information from your system. Use,=
 dissemination, distribution, or reproduction of this transmission by uninte=
nded recipients is not authorized and may be unlawful.
> _______________________________________________
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From: "Rosen, Brian" <Brian.Rosen@neustar.biz>
To: John-Luc Bakker <jbakker@rim.com>
Date: Mon, 20 Aug 2012 16:19:16 -0400
Thread-Topic: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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References: <FBD5AAFFD0978846BF6D3FAB4C892ACC0EB22C@SEA-EXMB-2.telecomsys.com> <502AB594.8000800@alum.mit.edu> <7F2072F1E0DE894DA4B517B93C6A05853408683666@ESESSCMS0356.eemea.ericsson.se> <502AC0FE.8040707@alum.mit.edu>, <CABkgnnXQBYxp10wcdDBATMb53vET5b_SQ+KdPkU2_MqSR=mRzg@mail.gmail.com> <7F2072F1E0DE894DA4B517B93C6A05853408683686@ESESSCMS0356.eemea.ericsson.se>, <155970D1DA8E174F9E46039E10E2AA351D94C4@XMB104ADS.rim.net> <7F2072F1E0DE894DA4B517B93C6A05853408683691@ESESSCMS0356.eemea.ericsson.se> <502E6573.80107@alum.mit.edu> <155970D1DA8E174F9E46039E10E2AA351DB027@XMB104ADS.rim.net>
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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I don't care much about this decision.

I'd prefer a new one.  My reason is that 3261 says:
It is RECOMMENDED
   that the value of "emergency" only be used when life, limb, or
   property are in imminent danger.

Call backs don't necessarily have that implication. They might, but it also=
 can be much less important.

I think most implementors would view the emergency call as having priority =
emergency, but not necessarily the call back.  That's why I think it would =
be better to create a new value.

But, as I said, I don't care much.

Brian

On Aug 20, 2012, at 3:38 PM, John-Luc Bakker <jbakker@rim.com> wrote:

> Folks,
>=20
> Going back to the original question:
>=20
>> Resolve to use "emergency" as the Private header value, since any new (o=
ther) value doesn't offer a real advantage.
>>=20
>> Does anyone disagree as to wg acceptance of this approach in the meeting=
?
>=20
> I haven't understood the position against using "emergency". I am happy t=
o use "emergency" as the Private header value.
>=20
> Kind regards,
>=20
> 	JL
>=20
> -----Original Message-----
> From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On Behalf Of=
 Paul Kyzivat
> Sent: Friday, August 17, 2012 10:38 AM
> To: ecrit@ietf.org
> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>=20
> On 8/17/12 3:52 AM, Christer Holmberg wrote:
>> Hi,
>>=20
>> I am saying that if the value has been verified, other entities within t=
he trust domain don't need to perform the verification. And, using a new va=
lue, those entities will also know that it is a PSAP callback.
>=20
> If you are working within a domain you can use whatever criteria you want=
 to decide whether to preserve or remove this header when it comes across t=
he boundary of the domain. If you want, the border elements can only permit=
 it from PSAPs.
>=20
> One it is inside the trust domain, it is what it is. If it's Priority:eme=
rgency, then that's what it is. Something inside the trust domain could hav=
e put it in. Or something on the boundary of the domain might have a differ=
ent policy to let it in from some class of users other than PSAPs.
>=20
> My point is that it is an emergency call, which might have a high probabi=
lity of being an emergency callback from a PSAP. It isn't definitively an e=
mergency callback. And then there needs to be a set of policies for how to =
handle emergency calls. That might include things like calling barred numbe=
rs that you don't want just anybody to be able to do.
>=20
> Of course this is just a philosophical difference from what you said.
>=20
> 	Thanks,
> 	Paul
>=20
>> Regards,
>>=20
>> Christer
>>=20
>> ________________________________________
>> From: ecrit-bounces@ietf.org [ecrit-bounces@ietf.org] On Behalf Of=20
>> John-Luc Bakker [jbakker@rim.com]
>> Sent: Thursday, August 16, 2012 6:22 PM
>> To: ecrit@ietf.org
>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>=20
>> Hi Christer,
>>=20
>> What you describe below is a trust domain applicable only to a particula=
r header field's value, right?
>> Are you saying only if the new value is present, the UA can derive that =
the header field value can be trusted as it must have been "subjected to ve=
rification" (any other value for that header field cannot be trusted)?
>>=20
>> I need to look deeper into trust domains, as I hadn't realized existing =
(legacy?) header fields could be subjected to trust domain, based on that h=
eader field's value.
>>=20
>> I was so far leaning towards Martin's and Paul's position, where they cl=
aim "emergency" is the right word.
>>=20
>> Regards,
>>=20
>>         John-Luc
>>=20
>> -----Original Message-----
>> From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On Behalf=20
>> Of Christer Holmberg
>> Sent: Thursday, August 16, 2012 4:28 AM
>> To: Martin Thomson; Paul Kyzivat
>> Cc: ecrit@ietf.org
>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>=20
>> Hi,
>>=20
>> It is true that some entity in the network needs to verify the context, =
and that the call comes from a PSAP. But, once that is done, other entities=
 within the same network (trust domain) do not need to do that.
>>=20
>> So, for that reason I think a new value would be good.
>>=20
>> Regards,
>>=20
>> Christer
>>=20
>> ________________________________________
>> From: Martin Thomson [martin.thomson@gmail.com]
>> Sent: Wednesday, August 15, 2012 7:36 PM
>> To: Paul Kyzivat
>> Cc: Christer Holmberg; ecrit@ietf.org
>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>=20
>> On 14 August 2012 14:19, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
>>> As I said, I'm *ok* with a new value.
>>> But it offends me to have to add a new value when we already have a=20
>>> value "emergency" and this *is* an emergency. It sets a precedent=20
>>> that nobody can use predefined values that weren't assigned for their=20
>>> own specific case. Its another example of a philosophy that we need=20
>>> to signal features or use cases rather than simply assemble basic primi=
tives to accomplish features.
>>=20
>> I'm with Paul on this one.  These are just labels that have essentially =
arbitrary or context-specific semantics.  This looks very much like a case =
where context is everything.
>>=20
>> "emergency" is the right word.  The only concern is that it might have s=
ome other meaning.  But those uses are specifically in some other context. =
 This is a new context (probably based on identification of the PSAP, but t=
hat's simply an example).
>>=20
>> If context provides insufficient information to enable the sorts of deci=
sion that we want to enable, then a new label isn't going to fix that.
>> _______________________________________________
>> Ecrit mailing list
>> Ecrit@ietf.org
>> https://www.ietf.org/mailman/listinfo/ecrit
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From pkyzivat@alum.mit.edu  Mon Aug 20 14:44:14 2012
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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On 8/20/12 4:19 PM, Rosen, Brian wrote:
> I don't care much about this decision.
>
> I'd prefer a new one.  My reason is that 3261 says:
> It is RECOMMENDED
>     that the value of "emergency" only be used when life, limb, or
>     property are in imminent danger.
>
> Call backs don't necessarily have that implication. They might, but it also can be much less important.
>
> I think most implementors would view the emergency call as having priority emergency, but not necessarily the call back.  That's why I think it would be better to create a new value.

Well, if the callback is happening because the emergency call was 
inadvertently disconnected, then it is still as much an emergency as it 
had been.

And I thought the psap could perform the "callback" without the priority 
if it isn't called for.

And, if it isn't a matter of life, limb, or property in danger, then I 
guess the carrier would be entitled to honor barring.

Also, the quote you cite argues that "emergency" shouldn't be in use for 
other sorts of things.

> But, as I said, I don't care much.

I won't bother to restate my position, since I've already done so enough.

	Thanks,
	Paul

> Brian
>
> On Aug 20, 2012, at 3:38 PM, John-Luc Bakker <jbakker@rim.com> wrote:
>
>> Folks,
>>
>> Going back to the original question:
>>
>>> Resolve to use "emergency" as the Private header value, since any new (other) value doesn't offer a real advantage.
>>>
>>> Does anyone disagree as to wg acceptance of this approach in the meeting?
>>
>> I haven't understood the position against using "emergency". I am happy to use "emergency" as the Private header value.
>>
>> Kind regards,
>>
>> 	JL
>>
>> -----Original Message-----
>> From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On Behalf Of Paul Kyzivat
>> Sent: Friday, August 17, 2012 10:38 AM
>> To: ecrit@ietf.org
>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>
>> On 8/17/12 3:52 AM, Christer Holmberg wrote:
>>> Hi,
>>>
>>> I am saying that if the value has been verified, other entities within the trust domain don't need to perform the verification. And, using a new value, those entities will also know that it is a PSAP callback.
>>
>> If you are working within a domain you can use whatever criteria you want to decide whether to preserve or remove this header when it comes across the boundary of the domain. If you want, the border elements can only permit it from PSAPs.
>>
>> One it is inside the trust domain, it is what it is. If it's Priority:emergency, then that's what it is. Something inside the trust domain could have put it in. Or something on the boundary of the domain might have a different policy to let it in from some class of users other than PSAPs.
>>
>> My point is that it is an emergency call, which might have a high probability of being an emergency callback from a PSAP. It isn't definitively an emergency callback. And then there needs to be a set of policies for how to handle emergency calls. That might include things like calling barred numbers that you don't want just anybody to be able to do.
>>
>> Of course this is just a philosophical difference from what you said.
>>
>> 	Thanks,
>> 	Paul
>>
>>> Regards,
>>>
>>> Christer
>>>
>>> ________________________________________
>>> From: ecrit-bounces@ietf.org [ecrit-bounces@ietf.org] On Behalf Of
>>> John-Luc Bakker [jbakker@rim.com]
>>> Sent: Thursday, August 16, 2012 6:22 PM
>>> To: ecrit@ietf.org
>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>>
>>> Hi Christer,
>>>
>>> What you describe below is a trust domain applicable only to a particular header field's value, right?
>>> Are you saying only if the new value is present, the UA can derive that the header field value can be trusted as it must have been "subjected to verification" (any other value for that header field cannot be trusted)?
>>>
>>> I need to look deeper into trust domains, as I hadn't realized existing (legacy?) header fields could be subjected to trust domain, based on that header field's value.
>>>
>>> I was so far leaning towards Martin's and Paul's position, where they claim "emergency" is the right word.
>>>
>>> Regards,
>>>
>>>          John-Luc
>>>
>>> -----Original Message-----
>>> From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On Behalf
>>> Of Christer Holmberg
>>> Sent: Thursday, August 16, 2012 4:28 AM
>>> To: Martin Thomson; Paul Kyzivat
>>> Cc: ecrit@ietf.org
>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>>
>>> Hi,
>>>
>>> It is true that some entity in the network needs to verify the context, and that the call comes from a PSAP. But, once that is done, other entities within the same network (trust domain) do not need to do that.
>>>
>>> So, for that reason I think a new value would be good.
>>>
>>> Regards,
>>>
>>> Christer
>>>
>>> ________________________________________
>>> From: Martin Thomson [martin.thomson@gmail.com]
>>> Sent: Wednesday, August 15, 2012 7:36 PM
>>> To: Paul Kyzivat
>>> Cc: Christer Holmberg; ecrit@ietf.org
>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>>
>>> On 14 August 2012 14:19, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
>>>> As I said, I'm *ok* with a new value.
>>>> But it offends me to have to add a new value when we already have a
>>>> value "emergency" and this *is* an emergency. It sets a precedent
>>>> that nobody can use predefined values that weren't assigned for their
>>>> own specific case. Its another example of a philosophy that we need
>>>> to signal features or use cases rather than simply assemble basic primitives to accomplish features.
>>>
>>> I'm with Paul on this one.  These are just labels that have essentially arbitrary or context-specific semantics.  This looks very much like a case where context is everything.
>>>
>>> "emergency" is the right word.  The only concern is that it might have some other meaning.  But those uses are specifically in some other context.  This is a new context (probably based on identification of the PSAP, but that's simply an example).
>>>
>>> If context provides insufficient information to enable the sorts of decision that we want to enable, then a new label isn't going to fix that.
>>> _______________________________________________
>>> Ecrit mailing list
>>> Ecrit@ietf.org
>>> https://www.ietf.org/mailman/listinfo/ecrit
>>>
>>> ---------------------------------------------------------------------
>>> This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful.
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>>
>>
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From christer.holmberg@ericsson.com  Tue Aug 21 00:56:46 2012
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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: 'Paul Kyzivat' <pkyzivat@alum.mit.edu>, "ecrit@ietf.org" <ecrit@ietf.org>
Date: Tue, 21 Aug 2012 09:56:41 +0200
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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Hi,

>>> I don't care much about this decision.
>>>
>>> I'd prefer a new one.  My reason is that 3261 says:
>>> It is RECOMMENDED that the value of "emergency" only be used when life,=
 limb, or
>>> property are in imminent danger.
>>
>> Call backs don't necessarily have that implication. They might, but it a=
lso can be much less important.
>>
>> I think most implementors would view the emergency call as having priori=
ty emergency, but not necessarily the call back.  That's why I think it wou=
ld be better to create a new value.
>
> Well, if the callback is happening because the emergency call was inadver=
tently disconnected, then it is still as much an emergency as it had been.
>
> And I thought the psap could perform the "callback" without the priority =
if it isn't called for.
>
> And, if it isn't a matter of life, limb, or property in danger, then I gu=
ess the carrier would be entitled to honor barring.

AFAIK, in countries where special treatment is given to PSAP callbacks, it =
applies to *ALL* callbacks. Now, in such countries, whether some callbacks =
would be given different importance, I don't know. But, it means that all c=
allbacks have to be indicated as callbacks.

So, if we think that there are cases where an PSAP would not indicate "emer=
gency" for a PSAP callback, I really think we need a separate value.

Regards,

Christer




> On Aug 20, 2012, at 3:38 PM, John-Luc Bakker <jbakker@rim.com> wrote:
>
>> Folks,
>>
>> Going back to the original question:
>>
>>> Resolve to use "emergency" as the Private header value, since any new (=
other) value doesn't offer a real advantage.
>>>
>>> Does anyone disagree as to wg acceptance of this approach in the meetin=
g?
>>
>> I haven't understood the position against using "emergency". I am happy =
to use "emergency" as the Private header value.
>>
>> Kind regards,
>>
>> 	JL
>>
>> -----Original Message-----
>> From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On=20
>> Behalf Of Paul Kyzivat
>> Sent: Friday, August 17, 2012 10:38 AM
>> To: ecrit@ietf.org
>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>
>> On 8/17/12 3:52 AM, Christer Holmberg wrote:
>>> Hi,
>>>
>>> I am saying that if the value has been verified, other entities within =
the trust domain don't need to perform the verification. And, using a new v=
alue, those entities will also know that it is a PSAP callback.
>>
>> If you are working within a domain you can use whatever criteria you wan=
t to decide whether to preserve or remove this header when it comes across =
the boundary of the domain. If you want, the border elements can only permi=
t it from PSAPs.
>>
>> One it is inside the trust domain, it is what it is. If it's Priority:em=
ergency, then that's what it is. Something inside the trust domain could ha=
ve put it in. Or something on the boundary of the domain might have a diffe=
rent policy to let it in from some class of users other than PSAPs.
>>
>> My point is that it is an emergency call, which might have a high probab=
ility of being an emergency callback from a PSAP. It isn't definitively an =
emergency callback. And then there needs to be a set of policies for how to=
 handle emergency calls. That might include things like calling barred numb=
ers that you don't want just anybody to be able to do.
>>
>> Of course this is just a philosophical difference from what you said.
>>
>> 	Thanks,
>> 	Paul
>>
>>> Regards,
>>>
>>> Christer
>>>
>>> ________________________________________
>>> From: ecrit-bounces@ietf.org [ecrit-bounces@ietf.org] On Behalf Of=20
>>> John-Luc Bakker [jbakker@rim.com]
>>> Sent: Thursday, August 16, 2012 6:22 PM
>>> To: ecrit@ietf.org
>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback=20
>>> Indicator
>>>
>>> Hi Christer,
>>>
>>> What you describe below is a trust domain applicable only to a particul=
ar header field's value, right?
>>> Are you saying only if the new value is present, the UA can derive that=
 the header field value can be trusted as it must have been "subjected to v=
erification" (any other value for that header field cannot be trusted)?
>>>
>>> I need to look deeper into trust domains, as I hadn't realized existing=
 (legacy?) header fields could be subjected to trust domain, based on that =
header field's value.
>>>
>>> I was so far leaning towards Martin's and Paul's position, where they c=
laim "emergency" is the right word.
>>>
>>> Regards,
>>>
>>>          John-Luc
>>>
>>> -----Original Message-----
>>> From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On=20
>>> Behalf Of Christer Holmberg
>>> Sent: Thursday, August 16, 2012 4:28 AM
>>> To: Martin Thomson; Paul Kyzivat
>>> Cc: ecrit@ietf.org
>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback=20
>>> Indicator
>>>
>>> Hi,
>>>
>>> It is true that some entity in the network needs to verify the context,=
 and that the call comes from a PSAP. But, once that is done, other entitie=
s within the same network (trust domain) do not need to do that.
>>>
>>> So, for that reason I think a new value would be good.
>>>
>>> Regards,
>>>
>>> Christer
>>>
>>> ________________________________________
>>> From: Martin Thomson [martin.thomson@gmail.com]
>>> Sent: Wednesday, August 15, 2012 7:36 PM
>>> To: Paul Kyzivat
>>> Cc: Christer Holmberg; ecrit@ietf.org
>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback=20
>>> Indicator
>>>
>>> On 14 August 2012 14:19, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
>>>> As I said, I'm *ok* with a new value.
>>>> But it offends me to have to add a new value when we already have a=20
>>>> value "emergency" and this *is* an emergency. It sets a precedent=20
>>>> that nobody can use predefined values that weren't assigned for=20
>>>> their own specific case. Its another example of a philosophy that=20
>>>> we need to signal features or use cases rather than simply assemble ba=
sic primitives to accomplish features.
>>>
>>> I'm with Paul on this one.  These are just labels that have essentially=
 arbitrary or context-specific semantics.  This looks very much like a case=
 where context is everything.
>>>
>>> "emergency" is the right word.  The only concern is that it might have =
some other meaning.  But those uses are specifically in some other context.=
  This is a new context (probably based on identification of the PSAP, but =
that's simply an example).
>>>
>>> If context provides insufficient information to enable the sorts of dec=
ision that we want to enable, then a new label isn't going to fix that.
>>> _______________________________________________
>>> Ecrit mailing list
>>> Ecrit@ietf.org
>>> https://www.ietf.org/mailman/listinfo/ecrit
>>>
>>> --------------------------------------------------------------------
>>> - This transmission (including any attachments) may contain=20
>>> confidential information, privileged material (including material prote=
cted by the solicitor-client or other applicable privileges), or constitute=
 non-public information. Any use of this information by anyone other than t=
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 in error, please immediately reply to the sender and delete this informati=
on from your system. Use, dissemination, distribution, or reproduction of t=
his transmission by unintended recipients is not authorized and may be unla=
wful.
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>>> Ecrit mailing list
>>> Ecrit@ietf.org
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Date: Tue, 21 Aug 2012 08:16:12 -0400
From: Marc Linsner <mlinsner@cisco.com>
To: "ecrit@ietf.org" <ecrit@ietf.org>
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Thread-Topic: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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If a PSAP callback *could* be something other than an emergency, what's
wrong with using less ambigous 'PSAP-callback' as the indicator?

-Marc-

-----Original Message-----
From: "Rosen, Brian" <Brian.Rosen@neustar.biz>
Date: Monday, August 20, 2012 4:19 PM
To: John-Luc Bakker <jbakker@rim.com>
Cc: "ecrit@ietf.org" <ecrit@ietf.org>
Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator

>I don't care much about this decision.
>
>I'd prefer a new one.  My reason is that 3261 says:
>It is RECOMMENDED
>   that the value of "emergency" only be used when life, limb, or
>   property are in imminent danger.
>
>Call backs don't necessarily have that implication. They might, but it
>also can be much less important.
>
>I think most implementors would view the emergency call as having
>priority emergency, but not necessarily the call back.  That's why I
>think it would be better to create a new value.
>
>But, as I said, I don't care much.
>
>Brian
>
>On Aug 20, 2012, at 3:38 PM, John-Luc Bakker <jbakker@rim.com> wrote:
>
>> Folks,
>> 
>> Going back to the original question:
>> 
>>> Resolve to use "emergency" as the Private header value, since any new
>>>(other) value doesn't offer a real advantage.
>>> 
>>> Does anyone disagree as to wg acceptance of this approach in the
>>>meeting?
>> 
>> I haven't understood the position against using "emergency". I am happy
>>to use "emergency" as the Private header value.
>> 
>> Kind regards,
>> 
>> 	JL
>> 
>> -----Original Message-----
>> From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On Behalf
>>Of Paul Kyzivat
>> Sent: Friday, August 17, 2012 10:38 AM
>> To: ecrit@ietf.org
>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>> 
>> On 8/17/12 3:52 AM, Christer Holmberg wrote:
>>> Hi,
>>> 
>>> I am saying that if the value has been verified, other entities within
>>>the trust domain don't need to perform the verification. And, using a
>>>new value, those entities will also know that it is a PSAP callback.
>> 
>> If you are working within a domain you can use whatever criteria you
>>want to decide whether to preserve or remove this header when it comes
>>across the boundary of the domain. If you want, the border elements can
>>only permit it from PSAPs.
>> 
>> One it is inside the trust domain, it is what it is. If it's
>>Priority:emergency, then that's what it is. Something inside the trust
>>domain could have put it in. Or something on the boundary of the domain
>>might have a different policy to let it in from some class of users
>>other than PSAPs.
>> 
>> My point is that it is an emergency call, which might have a high
>>probability of being an emergency callback from a PSAP. It isn't
>>definitively an emergency callback. And then there needs to be a set of
>>policies for how to handle emergency calls. That might include things
>>like calling barred numbers that you don't want just anybody to be able
>>to do.
>> 
>> Of course this is just a philosophical difference from what you said.
>> 
>> 	Thanks,
>> 	Paul
>> 
>>> Regards,
>>> 
>>> Christer
>>> 
>>> ________________________________________
>>> From: ecrit-bounces@ietf.org [ecrit-bounces@ietf.org] On Behalf Of
>>> John-Luc Bakker [jbakker@rim.com]
>>> Sent: Thursday, August 16, 2012 6:22 PM
>>> To: ecrit@ietf.org
>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>> 
>>> Hi Christer,
>>> 
>>> What you describe below is a trust domain applicable only to a
>>>particular header field's value, right?
>>> Are you saying only if the new value is present, the UA can derive
>>>that the header field value can be trusted as it must have been
>>>"subjected to verification" (any other value for that header field
>>>cannot be trusted)?
>>> 
>>> I need to look deeper into trust domains, as I hadn't realized
>>>existing (legacy?) header fields could be subjected to trust domain,
>>>based on that header field's value.
>>> 
>>> I was so far leaning towards Martin's and Paul's position, where they
>>>claim "emergency" is the right word.
>>> 
>>> Regards,
>>> 
>>>         John-Luc
>>> 
>>> -----Original Message-----
>>> From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On Behalf
>>> Of Christer Holmberg
>>> Sent: Thursday, August 16, 2012 4:28 AM
>>> To: Martin Thomson; Paul Kyzivat
>>> Cc: ecrit@ietf.org
>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>> 
>>> Hi,
>>> 
>>> It is true that some entity in the network needs to verify the
>>>context, and that the call comes from a PSAP. But, once that is done,
>>>other entities within the same network (trust domain) do not need to do
>>>that.
>>> 
>>> So, for that reason I think a new value would be good.
>>> 
>>> Regards,
>>> 
>>> Christer
>>> 
>>> ________________________________________
>>> From: Martin Thomson [martin.thomson@gmail.com]
>>> Sent: Wednesday, August 15, 2012 7:36 PM
>>> To: Paul Kyzivat
>>> Cc: Christer Holmberg; ecrit@ietf.org
>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>> 
>>> On 14 August 2012 14:19, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
>>>> As I said, I'm *ok* with a new value.
>>>> But it offends me to have to add a new value when we already have a
>>>> value "emergency" and this *is* an emergency. It sets a precedent
>>>> that nobody can use predefined values that weren't assigned for their
>>>> own specific case. Its another example of a philosophy that we need
>>>> to signal features or use cases rather than simply assemble basic
>>>>primitives to accomplish features.
>>> 
>>> I'm with Paul on this one.  These are just labels that have
>>>essentially arbitrary or context-specific semantics.  This looks very
>>>much like a case where context is everything.
>>> 
>>> "emergency" is the right word.  The only concern is that it might have
>>>some other meaning.  But those uses are specifically in some other
>>>context.  This is a new context (probably based on identification of
>>>the PSAP, but that's simply an example).
>>> 
>>> If context provides insufficient information to enable the sorts of
>>>decision that we want to enable, then a new label isn't going to fix
>>>that.
>>> _______________________________________________
>>> Ecrit mailing list
>>> Ecrit@ietf.org
>>> https://www.ietf.org/mailman/listinfo/ecrit
>>> 
>>> ---------------------------------------------------------------------
>>> This transmission (including any attachments) may contain confidential
>>>information, privileged material (including material protected by the
>>>solicitor-client or other applicable privileges), or constitute
>>>non-public information. Any use of this information by anyone other
>>>than the intended recipient is prohibited. If you have received this
>>>transmission in error, please immediately reply to the sender and
>>>delete this information from your system. Use, dissemination,
>>>distribution, or reproduction of this transmission by unintended
>>>recipients is not authorized and may be unlawful.
>>> _______________________________________________
>>> Ecrit mailing list
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>>> https://www.ietf.org/mailman/listinfo/ecrit
>>> _______________________________________________
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>>> https://www.ietf.org/mailman/listinfo/ecrit
>>> 
>> 
>> 
>> _______________________________________________
>> Ecrit mailing list
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>> https://www.ietf.org/mailman/listinfo/ecrit
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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I agree with you Marc.


On 8/21/12 3:16 PM, "Marc Linsner" <mlinsner@cisco.com> wrote:

> If a PSAP callback *could* be something other than an emergency, what's
> wrong with using less ambigous 'PSAP-callback' as the indicator?
> 
> -Marc-
> 
> -----Original Message-----
> From: "Rosen, Brian" <Brian.Rosen@neustar.biz>
> Date: Monday, August 20, 2012 4:19 PM
> To: John-Luc Bakker <jbakker@rim.com>
> Cc: "ecrit@ietf.org" <ecrit@ietf.org>
> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
> 
>> I don't care much about this decision.
>> 
>> I'd prefer a new one.  My reason is that 3261 says:
>> It is RECOMMENDED
>>   that the value of "emergency" only be used when life, limb, or
>>   property are in imminent danger.
>> 
>> Call backs don't necessarily have that implication. They might, but it
>> also can be much less important.
>> 
>> I think most implementors would view the emergency call as having
>> priority emergency, but not necessarily the call back.  That's why I
>> think it would be better to create a new value.
>> 
>> But, as I said, I don't care much.
>> 
>> Brian
>> 
>> On Aug 20, 2012, at 3:38 PM, John-Luc Bakker <jbakker@rim.com> wrote:
>> 
>>> Folks,
>>> 
>>> Going back to the original question:
>>> 
>>>> Resolve to use "emergency" as the Private header value, since any new
>>>> (other) value doesn't offer a real advantage.
>>>> 
>>>> Does anyone disagree as to wg acceptance of this approach in the
>>>> meeting?
>>> 
>>> I haven't understood the position against using "emergency". I am happy
>>> to use "emergency" as the Private header value.
>>> 
>>> Kind regards,
>>> 
>>> JL
>>> 
>>> -----Original Message-----
>>> From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On Behalf
>>> Of Paul Kyzivat
>>> Sent: Friday, August 17, 2012 10:38 AM
>>> To: ecrit@ietf.org
>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>> 
>>> On 8/17/12 3:52 AM, Christer Holmberg wrote:
>>>> Hi,
>>>> 
>>>> I am saying that if the value has been verified, other entities within
>>>> the trust domain don't need to perform the verification. And, using a
>>>> new value, those entities will also know that it is a PSAP callback.
>>> 
>>> If you are working within a domain you can use whatever criteria you
>>> want to decide whether to preserve or remove this header when it comes
>>> across the boundary of the domain. If you want, the border elements can
>>> only permit it from PSAPs.
>>> 
>>> One it is inside the trust domain, it is what it is. If it's
>>> Priority:emergency, then that's what it is. Something inside the trust
>>> domain could have put it in. Or something on the boundary of the domain
>>> might have a different policy to let it in from some class of users
>>> other than PSAPs.
>>> 
>>> My point is that it is an emergency call, which might have a high
>>> probability of being an emergency callback from a PSAP. It isn't
>>> definitively an emergency callback. And then there needs to be a set of
>>> policies for how to handle emergency calls. That might include things
>>> like calling barred numbers that you don't want just anybody to be able
>>> to do.
>>> 
>>> Of course this is just a philosophical difference from what you said.
>>> 
>>> Thanks,
>>> Paul
>>> 
>>>> Regards,
>>>> 
>>>> Christer
>>>> 
>>>> ________________________________________
>>>> From: ecrit-bounces@ietf.org [ecrit-bounces@ietf.org] On Behalf Of
>>>> John-Luc Bakker [jbakker@rim.com]
>>>> Sent: Thursday, August 16, 2012 6:22 PM
>>>> To: ecrit@ietf.org
>>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>>> 
>>>> Hi Christer,
>>>> 
>>>> What you describe below is a trust domain applicable only to a
>>>> particular header field's value, right?
>>>> Are you saying only if the new value is present, the UA can derive
>>>> that the header field value can be trusted as it must have been
>>>> "subjected to verification" (any other value for that header field
>>>> cannot be trusted)?
>>>> 
>>>> I need to look deeper into trust domains, as I hadn't realized
>>>> existing (legacy?) header fields could be subjected to trust domain,
>>>> based on that header field's value.
>>>> 
>>>> I was so far leaning towards Martin's and Paul's position, where they
>>>> claim "emergency" is the right word.
>>>> 
>>>> Regards,
>>>> 
>>>>         John-Luc
>>>> 
>>>> -----Original Message-----
>>>> From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On Behalf
>>>> Of Christer Holmberg
>>>> Sent: Thursday, August 16, 2012 4:28 AM
>>>> To: Martin Thomson; Paul Kyzivat
>>>> Cc: ecrit@ietf.org
>>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>>> 
>>>> Hi,
>>>> 
>>>> It is true that some entity in the network needs to verify the
>>>> context, and that the call comes from a PSAP. But, once that is done,
>>>> other entities within the same network (trust domain) do not need to do
>>>> that.
>>>> 
>>>> So, for that reason I think a new value would be good.
>>>> 
>>>> Regards,
>>>> 
>>>> Christer
>>>> 
>>>> ________________________________________
>>>> From: Martin Thomson [martin.thomson@gmail.com]
>>>> Sent: Wednesday, August 15, 2012 7:36 PM
>>>> To: Paul Kyzivat
>>>> Cc: Christer Holmberg; ecrit@ietf.org
>>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>>> 
>>>> On 14 August 2012 14:19, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
>>>>> As I said, I'm *ok* with a new value.
>>>>> But it offends me to have to add a new value when we already have a
>>>>> value "emergency" and this *is* an emergency. It sets a precedent
>>>>> that nobody can use predefined values that weren't assigned for their
>>>>> own specific case. Its another example of a philosophy that we need
>>>>> to signal features or use cases rather than simply assemble basic
>>>>> primitives to accomplish features.
>>>> 
>>>> I'm with Paul on this one.  These are just labels that have
>>>> essentially arbitrary or context-specific semantics.  This looks very
>>>> much like a case where context is everything.
>>>> 
>>>> "emergency" is the right word.  The only concern is that it might have
>>>> some other meaning.  But those uses are specifically in some other
>>>> context.  This is a new context (probably based on identification of
>>>> the PSAP, but that's simply an example).
>>>> 
>>>> If context provides insufficient information to enable the sorts of
>>>> decision that we want to enable, then a new label isn't going to fix
>>>> that.
>>>> _______________________________________________
>>>> Ecrit mailing list
>>>> Ecrit@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/ecrit
>>>> 
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>>>> transmission in error, please immediately reply to the sender and
>>>> delete this information from your system. Use, dissemination,
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>>> 
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From pkyzivat@alum.mit.edu  Tue Aug 21 06:43:56 2012
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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On 8/21/12 3:56 AM, Christer Holmberg wrote:
>
> Hi,
>
>>>> I don't care much about this decision.
>>>>
>>>> I'd prefer a new one.  My reason is that 3261 says:
>>>> It is RECOMMENDED that the value of "emergency" only be used when life, limb, or
>>>> property are in imminent danger.
>>>
>>> Call backs don't necessarily have that implication. They might, but it also can be much less important.
>>>
>>> I think most implementors would view the emergency call as having priority emergency, but not necessarily the call back.  That's why I think it would be better to create a new value.
>>
>> Well, if the callback is happening because the emergency call was inadvertently disconnected, then it is still as much an emergency as it had been.
>>
>> And I thought the psap could perform the "callback" without the priority if it isn't called for.
>>
>> And, if it isn't a matter of life, limb, or property in danger, then I guess the carrier would be entitled to honor barring.
>
> AFAIK, in countries where special treatment is given to PSAP callbacks, it applies to *ALL* callbacks. Now, in such countries, whether some callbacks would be given different importance, I don't know. But, it means that all callbacks have to be indicated as callbacks.

> So, if we think that there are cases where an PSAP would not indicate "emergency" for a PSAP callback, I really think we need a separate value.

Do you mean that if I make an emergency call today, and then next week 
the psap decides to call me back to take a survey about how nice they 
were on the phone, that should still be treated as an emergency callback 
that gets priority and can bypass barring???

Or if the operator in the PSAP calls to have pizza delivered for lunch 
that should be treated as an emergency callback and work even if the 
pizza place has had its calls barred?

I presume not. Rather, doesn't it need to be on a call by call basis, 
the psap will mark the calls that should be treated as emergency 
callback calls?

If so, then the job of the provider sw is to honor the marking if its 
there, and perhaps to screen which lines are permitted to include the 
marking.

In that case the psap can include "priority:xyz" for those calls it 
considers to be deserving of emergency callback treatment, and not 
include that marking for other calls. And that is the same whether "xyz" 
is "emergency" or "PSAP-callback".

	Thanks,
	Paul

> Regards,
>
> Christer
>
>
>
>
>> On Aug 20, 2012, at 3:38 PM, John-Luc Bakker <jbakker@rim.com> wrote:
>>
>>> Folks,
>>>
>>> Going back to the original question:
>>>
>>>> Resolve to use "emergency" as the Private header value, since any new (other) value doesn't offer a real advantage.
>>>>
>>>> Does anyone disagree as to wg acceptance of this approach in the meeting?
>>>
>>> I haven't understood the position against using "emergency". I am happy to use "emergency" as the Private header value.
>>>
>>> Kind regards,
>>>
>>> 	JL
>>>
>>> -----Original Message-----
>>> From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On
>>> Behalf Of Paul Kyzivat
>>> Sent: Friday, August 17, 2012 10:38 AM
>>> To: ecrit@ietf.org
>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>>
>>> On 8/17/12 3:52 AM, Christer Holmberg wrote:
>>>> Hi,
>>>>
>>>> I am saying that if the value has been verified, other entities within the trust domain don't need to perform the verification. And, using a new value, those entities will also know that it is a PSAP callback.
>>>
>>> If you are working within a domain you can use whatever criteria you want to decide whether to preserve or remove this header when it comes across the boundary of the domain. If you want, the border elements can only permit it from PSAPs.
>>>
>>> One it is inside the trust domain, it is what it is. If it's Priority:emergency, then that's what it is. Something inside the trust domain could have put it in. Or something on the boundary of the domain might have a different policy to let it in from some class of users other than PSAPs.
>>>
>>> My point is that it is an emergency call, which might have a high probability of being an emergency callback from a PSAP. It isn't definitively an emergency callback. And then there needs to be a set of policies for how to handle emergency calls. That might include things like calling barred numbers that you don't want just anybody to be able to do.
>>>
>>> Of course this is just a philosophical difference from what you said.
>>>
>>> 	Thanks,
>>> 	Paul
>>>
>>>> Regards,
>>>>
>>>> Christer
>>>>
>>>> ________________________________________
>>>> From: ecrit-bounces@ietf.org [ecrit-bounces@ietf.org] On Behalf Of
>>>> John-Luc Bakker [jbakker@rim.com]
>>>> Sent: Thursday, August 16, 2012 6:22 PM
>>>> To: ecrit@ietf.org
>>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback
>>>> Indicator
>>>>
>>>> Hi Christer,
>>>>
>>>> What you describe below is a trust domain applicable only to a particular header field's value, right?
>>>> Are you saying only if the new value is present, the UA can derive that the header field value can be trusted as it must have been "subjected to verification" (any other value for that header field cannot be trusted)?
>>>>
>>>> I need to look deeper into trust domains, as I hadn't realized existing (legacy?) header fields could be subjected to trust domain, based on that header field's value.
>>>>
>>>> I was so far leaning towards Martin's and Paul's position, where they claim "emergency" is the right word.
>>>>
>>>> Regards,
>>>>
>>>>           John-Luc
>>>>
>>>> -----Original Message-----
>>>> From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On
>>>> Behalf Of Christer Holmberg
>>>> Sent: Thursday, August 16, 2012 4:28 AM
>>>> To: Martin Thomson; Paul Kyzivat
>>>> Cc: ecrit@ietf.org
>>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback
>>>> Indicator
>>>>
>>>> Hi,
>>>>
>>>> It is true that some entity in the network needs to verify the context, and that the call comes from a PSAP. But, once that is done, other entities within the same network (trust domain) do not need to do that.
>>>>
>>>> So, for that reason I think a new value would be good.
>>>>
>>>> Regards,
>>>>
>>>> Christer
>>>>
>>>> ________________________________________
>>>> From: Martin Thomson [martin.thomson@gmail.com]
>>>> Sent: Wednesday, August 15, 2012 7:36 PM
>>>> To: Paul Kyzivat
>>>> Cc: Christer Holmberg; ecrit@ietf.org
>>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback
>>>> Indicator
>>>>
>>>> On 14 August 2012 14:19, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
>>>>> As I said, I'm *ok* with a new value.
>>>>> But it offends me to have to add a new value when we already have a
>>>>> value "emergency" and this *is* an emergency. It sets a precedent
>>>>> that nobody can use predefined values that weren't assigned for
>>>>> their own specific case. Its another example of a philosophy that
>>>>> we need to signal features or use cases rather than simply assemble basic primitives to accomplish features.
>>>>
>>>> I'm with Paul on this one.  These are just labels that have essentially arbitrary or context-specific semantics.  This looks very much like a case where context is everything.
>>>>
>>>> "emergency" is the right word.  The only concern is that it might have some other meaning.  But those uses are specifically in some other context.  This is a new context (probably based on identification of the PSAP, but that's simply an example).
>>>>
>>>> If context provides insufficient information to enable the sorts of decision that we want to enable, then a new label isn't going to fix that.
>>>> _______________________________________________
>>>> Ecrit mailing list
>>>> Ecrit@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/ecrit
>>>>
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From: "Rosen, Brian" <Brian.Rosen@neustar.biz>
To: Paul Kyzivat <pkyzivat@alum.mit.edu>
Date: Tue, 21 Aug 2012 10:06:39 -0400
Thread-Topic: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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We already differentiate between a call back to the device that sent the ca=
ll (Contact) vs a call back that happens later and is intended to reach the=
 caller rather than the device (AoR).  I don't think it would be appropriat=
e in most cases to use any kind of special treatment to a call placed a few=
 days after the emergency call placed to the AoR (and Contact is not likely=
 to work at that point).

OTOH, I can't see any hard and fast rules here.

I agree with your premise though - you mark the calls appropriately, regard=
less of what the marking we decide upon, and policing the marking is going =
to be important to avoid abuse.

Brian

On Aug 21, 2012, at 9:43 AM, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:

> On 8/21/12 3:56 AM, Christer Holmberg wrote:
>>=20
>> Hi,
>>=20
>>>>> I don't care much about this decision.
>>>>>=20
>>>>> I'd prefer a new one.  My reason is that 3261 says:
>>>>> It is RECOMMENDED that the value of "emergency" only be used when lif=
e, limb, or
>>>>> property are in imminent danger.
>>>>=20
>>>> Call backs don't necessarily have that implication. They might, but it=
 also can be much less important.
>>>>=20
>>>> I think most implementors would view the emergency call as having prio=
rity emergency, but not necessarily the call back.  That's why I think it w=
ould be better to create a new value.
>>>=20
>>> Well, if the callback is happening because the emergency call was inadv=
ertently disconnected, then it is still as much an emergency as it had been=
.
>>>=20
>>> And I thought the psap could perform the "callback" without the priorit=
y if it isn't called for.
>>>=20
>>> And, if it isn't a matter of life, limb, or property in danger, then I =
guess the carrier would be entitled to honor barring.
>>=20
>> AFAIK, in countries where special treatment is given to PSAP callbacks, =
it applies to *ALL* callbacks. Now, in such countries, whether some callbac=
ks would be given different importance, I don't know. But, it means that al=
l callbacks have to be indicated as callbacks.
>=20
>> So, if we think that there are cases where an PSAP would not indicate "e=
mergency" for a PSAP callback, I really think we need a separate value.
>=20
> Do you mean that if I make an emergency call today, and then next week th=
e psap decides to call me back to take a survey about how nice they were on=
 the phone, that should still be treated as an emergency callback that gets=
 priority and can bypass barring???
>=20
> Or if the operator in the PSAP calls to have pizza delivered for lunch th=
at should be treated as an emergency callback and work even if the pizza pl=
ace has had its calls barred?
>=20
> I presume not. Rather, doesn't it need to be on a call by call basis, the=
 psap will mark the calls that should be treated as emergency callback call=
s?
>=20
> If so, then the job of the provider sw is to honor the marking if its the=
re, and perhaps to screen which lines are permitted to include the marking.
>=20
> In that case the psap can include "priority:xyz" for those calls it consi=
ders to be deserving of emergency callback treatment, and not include that =
marking for other calls. And that is the same whether "xyz" is "emergency" =
or "PSAP-callback".
>=20
> 	Thanks,
> 	Paul
>=20
>> Regards,
>>=20
>> Christer
>>=20
>>=20
>>=20
>>=20
>>> On Aug 20, 2012, at 3:38 PM, John-Luc Bakker <jbakker@rim.com> wrote:
>>>=20
>>>> Folks,
>>>>=20
>>>> Going back to the original question:
>>>>=20
>>>>> Resolve to use "emergency" as the Private header value, since any new=
 (other) value doesn't offer a real advantage.
>>>>>=20
>>>>> Does anyone disagree as to wg acceptance of this approach in the meet=
ing?
>>>>=20
>>>> I haven't understood the position against using "emergency". I am happ=
y to use "emergency" as the Private header value.
>>>>=20
>>>> Kind regards,
>>>>=20
>>>> 	JL
>>>>=20
>>>> -----Original Message-----
>>>> From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On
>>>> Behalf Of Paul Kyzivat
>>>> Sent: Friday, August 17, 2012 10:38 AM
>>>> To: ecrit@ietf.org
>>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>>>=20
>>>> On 8/17/12 3:52 AM, Christer Holmberg wrote:
>>>>> Hi,
>>>>>=20
>>>>> I am saying that if the value has been verified, other entities withi=
n the trust domain don't need to perform the verification. And, using a new=
 value, those entities will also know that it is a PSAP callback.
>>>>=20
>>>> If you are working within a domain you can use whatever criteria you w=
ant to decide whether to preserve or remove this header when it comes acros=
s the boundary of the domain. If you want, the border elements can only per=
mit it from PSAPs.
>>>>=20
>>>> One it is inside the trust domain, it is what it is. If it's Priority:=
emergency, then that's what it is. Something inside the trust domain could =
have put it in. Or something on the boundary of the domain might have a dif=
ferent policy to let it in from some class of users other than PSAPs.
>>>>=20
>>>> My point is that it is an emergency call, which might have a high prob=
ability of being an emergency callback from a PSAP. It isn't definitively a=
n emergency callback. And then there needs to be a set of policies for how =
to handle emergency calls. That might include things like calling barred nu=
mbers that you don't want just anybody to be able to do.
>>>>=20
>>>> Of course this is just a philosophical difference from what you said.
>>>>=20
>>>> 	Thanks,
>>>> 	Paul
>>>>=20
>>>>> Regards,
>>>>>=20
>>>>> Christer
>>>>>=20
>>>>> ________________________________________
>>>>> From: ecrit-bounces@ietf.org [ecrit-bounces@ietf.org] On Behalf Of
>>>>> John-Luc Bakker [jbakker@rim.com]
>>>>> Sent: Thursday, August 16, 2012 6:22 PM
>>>>> To: ecrit@ietf.org
>>>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback
>>>>> Indicator
>>>>>=20
>>>>> Hi Christer,
>>>>>=20
>>>>> What you describe below is a trust domain applicable only to a partic=
ular header field's value, right?
>>>>> Are you saying only if the new value is present, the UA can derive th=
at the header field value can be trusted as it must have been "subjected to=
 verification" (any other value for that header field cannot be trusted)?
>>>>>=20
>>>>> I need to look deeper into trust domains, as I hadn't realized existi=
ng (legacy?) header fields could be subjected to trust domain, based on tha=
t header field's value.
>>>>>=20
>>>>> I was so far leaning towards Martin's and Paul's position, where they=
 claim "emergency" is the right word.
>>>>>=20
>>>>> Regards,
>>>>>=20
>>>>>          John-Luc
>>>>>=20
>>>>> -----Original Message-----
>>>>> From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On
>>>>> Behalf Of Christer Holmberg
>>>>> Sent: Thursday, August 16, 2012 4:28 AM
>>>>> To: Martin Thomson; Paul Kyzivat
>>>>> Cc: ecrit@ietf.org
>>>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback
>>>>> Indicator
>>>>>=20
>>>>> Hi,
>>>>>=20
>>>>> It is true that some entity in the network needs to verify the contex=
t, and that the call comes from a PSAP. But, once that is done, other entit=
ies within the same network (trust domain) do not need to do that.
>>>>>=20
>>>>> So, for that reason I think a new value would be good.
>>>>>=20
>>>>> Regards,
>>>>>=20
>>>>> Christer
>>>>>=20
>>>>> ________________________________________
>>>>> From: Martin Thomson [martin.thomson@gmail.com]
>>>>> Sent: Wednesday, August 15, 2012 7:36 PM
>>>>> To: Paul Kyzivat
>>>>> Cc: Christer Holmberg; ecrit@ietf.org
>>>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback
>>>>> Indicator
>>>>>=20
>>>>> On 14 August 2012 14:19, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
>>>>>> As I said, I'm *ok* with a new value.
>>>>>> But it offends me to have to add a new value when we already have a
>>>>>> value "emergency" and this *is* an emergency. It sets a precedent
>>>>>> that nobody can use predefined values that weren't assigned for
>>>>>> their own specific case. Its another example of a philosophy that
>>>>>> we need to signal features or use cases rather than simply assemble =
basic primitives to accomplish features.
>>>>>=20
>>>>> I'm with Paul on this one.  These are just labels that have essential=
ly arbitrary or context-specific semantics.  This looks very much like a ca=
se where context is everything.
>>>>>=20
>>>>> "emergency" is the right word.  The only concern is that it might hav=
e some other meaning.  But those uses are specifically in some other contex=
t.  This is a new context (probably based on identification of the PSAP, bu=
t that's simply an example).
>>>>>=20
>>>>> If context provides insufficient information to enable the sorts of d=
ecision that we want to enable, then a new label isn't going to fix that.
>>>>> _______________________________________________
>>>>> Ecrit mailing list
>>>>> Ecrit@ietf.org
>>>>> https://www.ietf.org/mailman/listinfo/ecrit
>>>>>=20
>>>>> --------------------------------------------------------------------
>>>>> - This transmission (including any attachments) may contain
>>>>> confidential information, privileged material (including material pro=
tected by the solicitor-client or other applicable privileges), or constitu=
te non-public information. Any use of this information by anyone other than=
 the intended recipient is prohibited. If you have received this transmissi=
on in error, please immediately reply to the sender and delete this informa=
tion from your system. Use, dissemination, distribution, or reproduction of=
 this transmission by unintended recipients is not authorized and may be un=
lawful.
>>>>> _______________________________________________
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>>>>> Ecrit@ietf.org
>>>>> https://www.ietf.org/mailman/listinfo/ecrit
>>>>> _______________________________________________
>>>>> Ecrit mailing list
>>>>> Ecrit@ietf.org
>>>>> https://www.ietf.org/mailman/listinfo/ecrit
>>>>>=20
>>>>=20
>>>>=20
>>>> _______________________________________________
>>>> Ecrit mailing list
>>>> Ecrit@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/ecrit
>>>>=20
>>>> ---------------------------------------------------------------------
>>>> This transmission (including any attachments) may contain confidential=
 information, privileged material (including material protected by the soli=
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rmation. Any use of this information by anyone other than the intended reci=
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 by unintended recipients is not authorized and may be unlawful.
>>>> _______________________________________________
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>>>> https://www.ietf.org/mailman/listinfo/ecrit
>>>=20
>>> _______________________________________________
>>> Ecrit mailing list
>>> Ecrit@ietf.org
>>> https://www.ietf.org/mailman/listinfo/ecrit
>>>=20
>>=20
>> _______________________________________________
>> Ecrit mailing list
>> Ecrit@ietf.org
>> https://www.ietf.org/mailman/listinfo/ecrit
>>=20
>=20
> _______________________________________________
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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+1

Hannes Tschofenig <Hannes.Tschofenig@nsn.com> wrote:

I agree with you Marc.


On 8/21/12 3:16 PM=2C "Marc Linsner" <mlinsner@cisco.com> wrote:

> If a PSAP callback *could* be something other than an emergency=2C what's
> wrong with using less ambigous 'PSAP-callback' as the indicator?
>
> -Marc-
>
> -----Original Message-----
> From: "Rosen=2C Brian" <Brian.Rosen@neustar.biz>
> Date: Monday=2C August 20=2C 2012 4:19 PM
> To: John-Luc Bakker <jbakker@rim.com>
> Cc: "ecrit@ietf.org" <ecrit@ietf.org>
> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>
>> I don't care much about this decision.
>>
>> I'd prefer a new one.  My reason is that 3261 says:
>> It is RECOMMENDED
>>   that the value of "emergency" only be used when life=2C limb=2C or
>>   property are in imminent danger.
>>
>> Call backs don't necessarily have that implication. They might=2C but it
>> also can be much less important.
>>
>> I think most implementors would view the emergency call as having
>> priority emergency=2C but not necessarily the call back.  That's why I
>> think it would be better to create a new value.
>>
>> But=2C as I said=2C I don't care much.
>>
>> Brian
>>
>> On Aug 20=2C 2012=2C at 3:38 PM=2C John-Luc Bakker <jbakker@rim.com> wro=
te:
>>
>>> Folks=2C
>>>
>>> Going back to the original question:
>>>
>>>> Resolve to use "emergency" as the Private header value=2C since any ne=
w
>>>> (other) value doesn't offer a real advantage.
>>>>
>>>> Does anyone disagree as to wg acceptance of this approach in the
>>>> meeting?
>>>
>>> I haven't understood the position against using "emergency". I am happy
>>> to use "emergency" as the Private header value.
>>>
>>> Kind regards=2C
>>>
>>> JL
>>>
>>> -----Original Message-----
>>> From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On Behalf
>>> Of Paul Kyzivat
>>> Sent: Friday=2C August 17=2C 2012 10:38 AM
>>> To: ecrit@ietf.org
>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>>
>>> On 8/17/12 3:52 AM=2C Christer Holmberg wrote:
>>>> Hi=2C
>>>>
>>>> I am saying that if the value has been verified=2C other entities with=
in
>>>> the trust domain don't need to perform the verification. And=2C using =
a
>>>> new value=2C those entities will also know that it is a PSAP callback.
>>>
>>> If you are working within a domain you can use whatever criteria you
>>> want to decide whether to preserve or remove this header when it comes
>>> across the boundary of the domain. If you want=2C the border elements c=
an
>>> only permit it from PSAPs.
>>>
>>> One it is inside the trust domain=2C it is what it is. If it's
>>> Priority:emergency=2C then that's what it is. Something inside the trus=
t
>>> domain could have put it in. Or something on the boundary of the domain
>>> might have a different policy to let it in from some class of users
>>> other than PSAPs.
>>>
>>> My point is that it is an emergency call=2C which might have a high
>>> probability of being an emergency callback from a PSAP. It isn't
>>> definitively an emergency callback. And then there needs to be a set of
>>> policies for how to handle emergency calls. That might include things
>>> like calling barred numbers that you don't want just anybody to be able
>>> to do.
>>>
>>> Of course this is just a philosophical difference from what you said.
>>>
>>> Thanks=2C
>>> Paul
>>>
>>>> Regards=2C
>>>>
>>>> Christer
>>>>
>>>> ________________________________________
>>>> From: ecrit-bounces@ietf.org [ecrit-bounces@ietf.org] On Behalf Of
>>>> John-Luc Bakker [jbakker@rim.com]
>>>> Sent: Thursday=2C August 16=2C 2012 6:22 PM
>>>> To: ecrit@ietf.org
>>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>>>
>>>> Hi Christer=2C
>>>>
>>>> What you describe below is a trust domain applicable only to a
>>>> particular header field's value=2C right?
>>>> Are you saying only if the new value is present=2C the UA can derive
>>>> that the header field value can be trusted as it must have been
>>>> "subjected to verification" (any other value for that header field
>>>> cannot be trusted)?
>>>>
>>>> I need to look deeper into trust domains=2C as I hadn't realized
>>>> existing (legacy?) header fields could be subjected to trust domain=2C
>>>> based on that header field's value.
>>>>
>>>> I was so far leaning towards Martin's and Paul's position=2C where the=
y
>>>> claim "emergency" is the right word.
>>>>
>>>> Regards=2C
>>>>
>>>>         John-Luc
>>>>
>>>> -----Original Message-----
>>>> From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On Behalf
>>>> Of Christer Holmberg
>>>> Sent: Thursday=2C August 16=2C 2012 4:28 AM
>>>> To: Martin Thomson=3B Paul Kyzivat
>>>> Cc: ecrit@ietf.org
>>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>>>
>>>> Hi=2C
>>>>
>>>> It is true that some entity in the network needs to verify the
>>>> context=2C and that the call comes from a PSAP. But=2C once that is do=
ne=2C
>>>> other entities within the same network (trust domain) do not need to d=
o
>>>> that.
>>>>
>>>> So=2C for that reason I think a new value would be good.
>>>>
>>>> Regards=2C
>>>>
>>>> Christer
>>>>
>>>> ________________________________________
>>>> From: Martin Thomson [martin.thomson@gmail.com]
>>>> Sent: Wednesday=2C August 15=2C 2012 7:36 PM
>>>> To: Paul Kyzivat
>>>> Cc: Christer Holmberg=3B ecrit@ietf.org
>>>> Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
>>>>
>>>> On 14 August 2012 14:19=2C Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
>>>>> As I said=2C I'm *ok* with a new value.
>>>>> But it offends me to have to add a new value when we already have a
>>>>> value "emergency" and this *is* an emergency. It sets a precedent
>>>>> that nobody can use predefined values that weren't assigned for their
>>>>> own specific case. Its another example of a philosophy that we need
>>>>> to signal features or use cases rather than simply assemble basic
>>>>> primitives to accomplish features.
>>>>
>>>> I'm with Paul on this one.  These are just labels that have
>>>> essentially arbitrary or context-specific semantics.  This looks very
>>>> much like a case where context is everything.
>>>>
>>>> "emergency" is the right word.  The only concern is that it might have
>>>> some other meaning.  But those uses are specifically in some other
>>>> context.  This is a new context (probably based on identification of
>>>> the PSAP=2C but that's simply an example).
>>>>
>>>> If context provides insufficient information to enable the sorts of
>>>> decision that we want to enable=2C then a new label isn't going to fix
>>>> that.
>>>> _______________________________________________
>>>> Ecrit mailing list
>>>> Ecrit@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/ecrit
>>>>
>>>> ---------------------------------------------------------------------
>>>> This transmission (including any attachments) may contain confidential
>>>> information=2C privileged material (including material protected by th=
e
>>>> solicitor-client or other applicable privileges)=2C or constitute
>>>> non-public information. Any use of this information by anyone other
>>>> than the intended recipient is prohibited. If you have received this
>>>> transmission in error=2C please immediately reply to the sender and
>>>> delete this information from your system. Use=2C dissemination=2C
>>>> distribution=2C or reproduction of this transmission by unintended
>>>> recipients is not authorized and may be unlawful.
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>>>
>>>
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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Paul Kyzivat <pkyzivat@alum.mit.edu>
Date: Tue, 21 Aug 2012 18:16:38 +0200
Thread-Topic: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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References: <FBD5AAFFD0978846BF6D3FAB4C892ACC0EB22C@SEA-EXMB-2.telecomsys.com> <502AB594.8000800@alum.mit.edu> <7F2072F1E0DE894DA4B517B93C6A05853408683666@ESESSCMS0356.eemea.ericsson.se> <502AC0FE.8040707@alum.mit.edu>, <CABkgnnXQBYxp10wcdDBATMb53vET5b_SQ+KdPkU2_MqSR=mRzg@mail.gmail.com> <7F2072F1E0DE894DA4B517B93C6A05853408683686@ESESSCMS0356.eemea.ericsson.se>, <155970D1DA8E174F9E46039E10E2AA351D94C4@XMB104ADS.rim.net> <7F2072F1E0DE894DA4B517B93C6A05853408683691@ESESSCMS0356.eemea.ericsson.se> <502E6573.80107@alum.mit.edu> <155970D1DA8E174F9E46039E10E2AA351DB027@XMB104ADS.rim.net> <44CDF7EF-01D3-49ED-AD32-C54EDFFE1880@neustar.biz> <5032AFAB.4080300@alum.mit.edu> <7F2072F1E0DE894DA4B517B93C6A0585340A1E3A6B@ESESSCMS0356.eemea.ericsson.se>, <50339093.5080700@alum.mit.edu>
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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Hi,

>>>>>> I don't care much about this decision.
>>>>>>
>>>>>> I'd prefer a new one.  My reason is that 3261 says:
>>>>>> It is RECOMMENDED that the value of "emergency" only be used when li=
fe, limb, or
>>>>>> property are in imminent danger.
>>>>>
>>>>> Call backs don't necessarily have that implication. They might, but i=
t also can be much less important.
>>>>>
>>>>> I think most implementors would view the emergency call as having pri=
ority emergency, but not necessarily the call back.  That's why I think it =
would be better to create a new value.
>>>>
>>>> Well, if the callback is happening because the emergency call was inad=
vertently disconnected, then it is still as much an emergency as it had bee=
n.
>>>>
>>>> And I thought the psap could perform the "callback" without the priori=
ty if it isn't called for.
>>>>
>>>> And, if it isn't a matter of life, limb, or property in danger, then I=
 guess the carrier would be entitled to honor barring.
>>>
>>> AFAIK, in countries where special treatment is given to PSAP callbacks,=
 it applies to *ALL* callbacks. Now, in such=20
>>> countries, whether some callbacks would be given different importance, =
I don't know. But, it means that all callbacks have to be indicated as call=
backs.
>>
>> So, if we think that there are cases where an PSAP would not indicate "e=
mergency" for a PSAP callback, I really think we need a separate value.
>
> Do you mean that if I make an emergency call today, and then next week
> the psap decides to call me back to take a survey about how nice they
> were on the phone, that should still be treated as an emergency callback
> that gets priority and can bypass barring???

Note that "callback" and "call back" are not necessarily the same thing :)

If the call from PSAP is classified as a "PSAP callback", then it shall get=
 special treatment.

If the call from the PSAP is just another "call back", then it would not ge=
t special treatment.

>Or if the operator in the PSAP calls to have pizza delivered for lunch
>that should be treated as an emergency callback and work even if the
>pizza place has had its calls barred?

In that case it is not a "PSAP callback".

>I presume not. Rather, doesn't it need to be on a call by call basis,
>the psap will mark the calls that should be treated as emergency
>callback calls?

I am not saying that ALL calls from a PSAP shall be marked as "PSAP callbac=
ks". Only "PSAP callbacks" calls shall be marked as "PSAP callback" :)

And, in the case the PSAP calls 911, e.g. because the building where the PS=
AP is located is burning, that would not be marked as a "PSAP callback" eit=
her. It would, however, be marked "emergency".

Regards,

Christer=

From pkyzivat@alum.mit.edu  Tue Aug 21 10:12:08 2012
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References: <FBD5AAFFD0978846BF6D3FAB4C892ACC0EB22C@SEA-EXMB-2.telecomsys.com> <502AB594.8000800@alum.mit.edu> <7F2072F1E0DE894DA4B517B93C6A05853408683666@ESESSCMS0356.eemea.ericsson.se> <502AC0FE.8040707@alum.mit.edu>, <CABkgnnXQBYxp10wcdDBATMb53vET5b_SQ+KdPkU2_MqSR=mRzg@mail.gmail.com> <7F2072F1E0DE894DA4B517B93C6A05853408683686@ESESSCMS0356.eemea.ericsson.se>, <155970D1DA8E174F9E46039E10E2AA351D94C4@XMB104ADS.rim.net> <7F2072F1E0DE894DA4B517B93C6A05853408683691@ESESSCMS0356.eemea.ericsson.se> <502E6573.80107@alum.mit.edu> <155970D1DA8E174F9E46039E10E2AA351DB027@XMB104ADS.rim.net> <44CDF7EF-01D3-49ED-AD32-C54EDFFE1880@neustar.biz> <5032AFAB.4080300@alum.mit.edu> <7F2072F1E0DE894DA4B517B93C6A0585340A1E3A6B@ESESSCMS0356.eemea.ericsson.se>, <50339093.5080700@alum.mit.edu> <7F2072F1E0DE894DA4B517B93C6A05853409FF2EC8@ESESSCMS0356.eemea.ericsson.se>
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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On 8/21/12 12:16 PM, Christer Holmberg wrote:

>> Do you mean that if I make an emergency call today, and then next week
>> the psap decides to call me back to take a survey about how nice they
>> were on the phone, that should still be treated as an emergency callback
>> that gets priority and can bypass barring???
>
> Note that "callback" and "call back" are not necessarily the same thing :)
>
> If the call from PSAP is classified as a "PSAP callback", then it shall get special treatment.
>
> If the call from the PSAP is just another "call back", then it would not get special treatment.
>
>> Or if the operator in the PSAP calls to have pizza delivered for lunch
>> that should be treated as an emergency callback and work even if the
>> pizza place has had its calls barred?
>
> In that case it is not a "PSAP callback".
>
>> I presume not. Rather, doesn't it need to be on a call by call basis,
>> the psap will mark the calls that should be treated as emergency
>> callback calls?
>
> I am not saying that ALL calls from a PSAP shall be marked as "PSAP callbacks". Only "PSAP callbacks" calls shall be marked as "PSAP callback" :)

OK. Unless somebody else chimes in, I guess this part is clear.
And it would be true regardless of whether the marking is 
"Priority:psap-callback" or "Priority:emergency". Right?

> And, in the case the PSAP calls 911, e.g. because the building where the PSAP is located is burning, that would not be marked as a "PSAP callback" either. It would, however, be marked "emergency".

I guess this raises the question of whether the 911 call might contain 
Priority:emergency, and if so what that means.

Superficially it seems reasonable that an emergency call (and presumably 
a 911 call qualifies) could, and perhaps SHOULD, contain 
Priority:emergency. And if so, does that imply the same semantics as the 
callback case?

The distinction here is not about the priority of the call. It is about 
whether the priority is based on the status of the caller or the callee, 
if that matters.

ISTM that the *call* is equally important regardless of the direction. 
For instance, in the unlikely event that the psap hasn't paid its phone 
bills and has been barred, the 911 call should still go through.

Is it really necessary for the indication of the priority of the call to 
indicate which end the priority applies to???

I don't think so. But if so, then maybe we need:

Priority: caller-emergency
Priority: callee-emergency

The notion of "emergency callback" is just an artifact. The prior 
emergency call is the way in which the psap has learned that the call 
being made is about an ongoing emergency at the callee.

For instance - suppose I call 911 on my home phone and am talking to the 
psap. But then I have to move away from that phone. (The fire is getting 
too close to me.) But I have a cell phone. It would be good if the psap 
could call my phone and have it treated as an "emergency callback". (So 
even if my phone is barred it would work.) And this is better than me 
calling 911 again on my cell phone because even if it isn't barred I 
might not get the same psap or operator.

	Thanks
	Paul

	Thanks,
	Paul

From christer.holmberg@ericsson.com  Tue Aug 21 11:21:50 2012
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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Paul Kyzivat <pkyzivat@alum.mit.edu>
Date: Tue, 21 Aug 2012 20:21:28 +0200
Thread-Topic: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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References: <FBD5AAFFD0978846BF6D3FAB4C892ACC0EB22C@SEA-EXMB-2.telecomsys.com> <502AB594.8000800@alum.mit.edu> <7F2072F1E0DE894DA4B517B93C6A05853408683666@ESESSCMS0356.eemea.ericsson.se> <502AC0FE.8040707@alum.mit.edu>, <CABkgnnXQBYxp10wcdDBATMb53vET5b_SQ+KdPkU2_MqSR=mRzg@mail.gmail.com> <7F2072F1E0DE894DA4B517B93C6A05853408683686@ESESSCMS0356.eemea.ericsson.se>, <155970D1DA8E174F9E46039E10E2AA351D94C4@XMB104ADS.rim.net> <7F2072F1E0DE894DA4B517B93C6A05853408683691@ESESSCMS0356.eemea.ericsson.se> <502E6573.80107@alum.mit.edu> <155970D1DA8E174F9E46039E10E2AA351DB027@XMB104ADS.rim.net> <44CDF7EF-01D3-49ED-AD32-C54EDFFE1880@neustar.biz> <5032AFAB.4080300@alum.mit.edu> <7F2072F1E0DE894DA4B517B93C6A0585340A1E3A6B@ESESSCMS0356.eemea.ericsson.se>, <50339093.5080700@alum.mit.edu> <7F2072F1E0DE894DA4B517B93C6A05853409FF2EC8@ESESSCMS0356.eemea.ericsson.se>, <5033C164.20807@alum.mit.edu>
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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Hi,

>>> Do you mean that if I make an emergency call today, and then next week
>>> the psap decides to call me back to take a survey about how nice they
>>> were on the phone, that should still be treated as an emergency callbac=
k
>>> that gets priority and can bypass barring???
>>
>> Note that "callback" and "call back" are not necessarily the same thing =
:)
>>
>> If the call from PSAP is classified as a "PSAP callback", then it shall =
get special treatment.
>>
>> If the call from the PSAP is just another "call back", then it would not=
 get special treatment.
>>
>>> Or if the operator in the PSAP calls to have pizza delivered for lunch
>>> that should be treated as an emergency callback and work even if the
>>> pizza place has had its calls barred?
>>
>> In that case it is not a "PSAP callback".
>>
>>> I presume not. Rather, doesn't it need to be on a call by call basis,
>>> the psap will mark the calls that should be treated as emergency
>>> callback calls?
>>
>> I am not saying that ALL calls from a PSAP shall be marked as "PSAP call=
backs". Only "PSAP callbacks" calls shall be marked as "PSAP callback" :)
>
> OK. Unless somebody else chimes in, I guess this part is clear.
> And it would be true regardless of whether the marking is
> "Priority:psap-callback" or "Priority:emergency". Right?

Well, it depends on whether the PSAP would use "Priority:emergency" for som=
ething else than PSAP callback calls (see below). But, it would only use "P=
riority-psap-callback" for PSAP callback calls.

>> And, in the case the PSAP calls 911, e.g. because the building where the=
 PSAP is located is burning, that would not be marked as a "PSAP callback" =
either. It would, however, be marked "emergency".
>
> I guess this raises the question of whether the 911 call might contain Pr=
iority:emergency, and if so what that means.

Ok, but my point was that if the PSAP makes an emergency call itself, it wo=
uld not be marked as a PSAP callback call. It may still be marked (using wh=
atever mechanism) as an emergency call, though.

> Superficially it seems reasonable that an emergency call (and presumably
> a 911 call qualifies) could, and perhaps SHOULD, contain
> Priority:emergency. And if so, does that imply the same semantics as the
> callback case?

At least I think they are routed differently. An emergency call is routed t=
owards a PSAP, while a callback call is routed towards the caller who made =
the associated emergency call.

> The distinction here is not about the priority of the call. It is about
> whether the priority is based on the status of the caller or the callee,
> if that matters.
>
> ISTM that the *call* is equally important regardless of the direction.
> For instance, in the unlikely event that the psap hasn't paid its phone
> bills and has been barred, the 911 call should still go through.
>
> Is it really necessary for the indication of the priority of the call to
> indicate which end the priority applies to???
>
> I don't think so. But if so, then maybe we need:
>
> Priority: caller-emergency
> Priority: callee-emergency
>
> The notion of "emergency callback" is just an artifact. The prior
> emergency call is the way in which the psap has learned that the call
> being made is about an ongoing emergency at the callee.
>
> For instance - suppose I call 911 on my home phone and am talking to the
> psap. But then I have to move away from that phone. (The fire is getting
> too close to me.) But I have a cell phone. It would be good if the psap
> could call my phone and have it treated as an "emergency callback". (So
> even if my phone is barred it would work.) And this is better than me
> calling 911 again on my cell phone because even if it isn't barred I
> might not get the same psap or operator.

Yes - and that is what PSAP callback is about :)=20

There is no such thing as "emergency callback". There are "emergency calls"=
 and "PSAP callbacks" :)

Regards,

Christer=

From pkyzivat@alum.mit.edu  Tue Aug 21 11:51:27 2012
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References: <FBD5AAFFD0978846BF6D3FAB4C892ACC0EB22C@SEA-EXMB-2.telecomsys.com> <502AB594.8000800@alum.mit.edu> <7F2072F1E0DE894DA4B517B93C6A05853408683666@ESESSCMS0356.eemea.ericsson.se> <502AC0FE.8040707@alum.mit.edu>, <CABkgnnXQBYxp10wcdDBATMb53vET5b_SQ+KdPkU2_MqSR=mRzg@mail.gmail.com> <7F2072F1E0DE894DA4B517B93C6A05853408683686@ESESSCMS0356.eemea.ericsson.se>, <155970D1DA8E174F9E46039E10E2AA351D94C4@XMB104ADS.rim.net> <7F2072F1E0DE894DA4B517B93C6A05853408683691@ESESSCMS0356.eemea.ericsson.se> <502E6573.80107@alum.mit.edu> <155970D1DA8E174F9E46039E10E2AA351DB027@XMB104ADS.rim.net> <44CDF7EF-01D3-49ED-AD32-C54EDFFE1880@neustar.biz> <5032AFAB.4080300@alum.mit.edu> <7F2072F1E0DE894DA4B517B93C6A0585340A1E3A6B@ESESSCMS0356.eemea.ericsson.se>, <50339093.5080700@alum.mit.edu> <7F2072F1E0DE894DA4B517B93C6A05853409FF2EC8@ESESSCMS0356.eemea.ericsson.se>, <5033C164.20807@alum.mit.edu> <7F2072F1E0DE894DA4B517B93C6A05853409FF2ED0@ESESSCMS0356.eemea.ericsson.se>
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On 8/21/12 2:21 PM, Christer Holmberg wrote:
> Hi,
>
>>>> Do you mean that if I make an emergency call today, and then next week
>>>> the psap decides to call me back to take a survey about how nice they
>>>> were on the phone, that should still be treated as an emergency callback
>>>> that gets priority and can bypass barring???
>>>
>>> Note that "callback" and "call back" are not necessarily the same thing :)
>>>
>>> If the call from PSAP is classified as a "PSAP callback", then it shall get special treatment.
>>>
>>> If the call from the PSAP is just another "call back", then it would not get special treatment.
>>>
>>>> Or if the operator in the PSAP calls to have pizza delivered for lunch
>>>> that should be treated as an emergency callback and work even if the
>>>> pizza place has had its calls barred?
>>>
>>> In that case it is not a "PSAP callback".
>>>
>>>> I presume not. Rather, doesn't it need to be on a call by call basis,
>>>> the psap will mark the calls that should be treated as emergency
>>>> callback calls?
>>>
>>> I am not saying that ALL calls from a PSAP shall be marked as "PSAP callbacks". Only "PSAP callbacks" calls shall be marked as "PSAP callback" :)
>>
>> OK. Unless somebody else chimes in, I guess this part is clear.
>> And it would be true regardless of whether the marking is
>> "Priority:psap-callback" or "Priority:emergency". Right?
>
> Well, it depends on whether the PSAP would use "Priority:emergency" for something else than PSAP callback calls (see below). But, it would only use "Priority-psap-callback" for PSAP callback calls.

My point was just that in the end it is a label. The label will trigger 
certain behavior, regardless of the name we choose for that.

>>> And, in the case the PSAP calls 911, e.g. because the building where the PSAP is located is burning, that would not be marked as a "PSAP callback" either. It would, however, be marked "emergency".
>>
>> I guess this raises the question of whether the 911 call might contain Priority:emergency, and if so what that means.
>
> Ok, but my point was that if the PSAP makes an emergency call itself, it would not be marked as a PSAP callback call. It may still be marked (using whatever mechanism) as an emergency call, though.
>
>> Superficially it seems reasonable that an emergency call (and presumably
>> a 911 call qualifies) could, and perhaps SHOULD, contain
>> Priority:emergency. And if so, does that imply the same semantics as the
>> callback case?
>
> At least I think they are routed differently. An emergency call is routed towards a PSAP, while a callback call is routed towards the caller who made the associated emergency call.

The mechanism for emergency calls has been defined to work without use 
of the Priority header. The routing of the call is determined by the 
request URI containing urn:sos. The presence or absence of 
Priority:emergency wouldn't change that.

And maybe the provider wouldn't allow the caller to put in 
Priority:emergency.

But *if* the call *did* have Priority:emergency, and it wasn't stripped 
(because it was the psap calling 911) then presumably it would work the 
same as a psap-callback.

>> The distinction here is not about the priority of the call. It is about
>> whether the priority is based on the status of the caller or the callee,
>> if that matters.
>>
>> ISTM that the *call* is equally important regardless of the direction.
>> For instance, in the unlikely event that the psap hasn't paid its phone
>> bills and has been barred, the 911 call should still go through.
>>
>> Is it really necessary for the indication of the priority of the call to
>> indicate which end the priority applies to???
>>
>> I don't think so. But if so, then maybe we need:
>>
>> Priority: caller-emergency
>> Priority: callee-emergency
>>
>> The notion of "emergency callback" is just an artifact. The prior
>> emergency call is the way in which the psap has learned that the call
>> being made is about an ongoing emergency at the callee.
>>
>> For instance - suppose I call 911 on my home phone and am talking to the
>> psap. But then I have to move away from that phone. (The fire is getting
>> too close to me.) But I have a cell phone. It would be good if the psap
>> could call my phone and have it treated as an "emergency callback". (So
>> even if my phone is barred it would work.) And this is better than me
>> calling 911 again on my cell phone because even if it isn't barred I
>> might not get the same psap or operator.
>
> Yes - and that is what PSAP callback is about :)

AFAIK the assumption has been that a "psap callback" is always in 
conjunction with a prior recent emergency call, and to the same device 
that initiated that call.

What I described above is to a device that isn't the same one that made 
the emergency call, and not even to another device with the same AOR.

Its really a fundamental conceptual difference, even if the same 
mechanisms support both. Its a change to a concept that the psap can 
mark a call (any call it makes) as deserving of this special treatment.

> There is no such thing as "emergency callback". There are "emergency calls" and "PSAP callbacks" :)

Or "calls indicating that the caller wants help with an emergency", and 
"calls indicating that the caller needs to talk to the callee about a 
callee emergency".

	Thanks,
	Paul

> Regards,
>
> Christer
>


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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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On 21 August 2012 10:12, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
> The distinction here is not about the priority of the call. It is about
> whether the priority is based on the status of the caller or the callee, if
> that matters.

Whoa, we're at risk of over-rotating on this one.

A callback is a call that is marked with Priority: helphelp (or
whatever) and the proxy makes some determination about call treatment
based on information it has.  This is likely caller identity == PSAP,
but it doesn't matter...let the operator choose a policy that both
complies with the laws of the land and with their customer's
preferences (i.e., their own business needs).

An emergency call is a call to urn:service:sos.  That call might be
marked as Priority: omgmyfacemyface, but the primary determinant for
how the call is treated is the callee, which is *by definition* a
PSAP.

Two cases, two sets of rules (one intentionally fuzzy, one crystal
clear).  Done.

--Martin

From pkyzivat@alum.mit.edu  Tue Aug 21 16:42:18 2012
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Subject: Re: [Ecrit] ecrit-psap-callback-04 - PSAP Callback Indicator
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Martin,

In an earlier reply to christer I agreed with you, that the mechanism 
for emergency calls works just fine without using Priority. That 
overloads a lot of things, but a big part of it is that the decision of 
who the call is *to* is delegated to the network more than it usually is.

On 8/21/12 7:11 PM, Martin Thomson wrote:
> On 21 August 2012 10:12, Paul Kyzivat <pkyzivat@alum.mit.edu> wrote:
>> The distinction here is not about the priority of the call. It is about
>> whether the priority is based on the status of the caller or the callee, if
>> that matters.
>
> Whoa, we're at risk of over-rotating on this one.
>
> A callback is a call that is marked with Priority: helphelp (or
> whatever) and the proxy makes some determination about call treatment
> based on information it has.  This is likely caller identity == PSAP,
> but it doesn't matter...let the operator choose a policy that both
> complies with the laws of the land and with their customer's
> preferences (i.e., their own business needs).

It sounds like you are agreeing with me that a psap callback may not be 
"back" to a phone that made an emergency call. And maybe its not even 
"back" to a person who made an emergency call.

Its just a call that the psap operator wants to receive special 
treatment. There may be policies about when this can be used, but that 
is different from building limitations into the mechanism.

	Thanks,
	Paul

> An emergency call is a call to urn:service:sos.  That call might be
> marked as Priority: omgmyfacemyface, but the primary determinant for
> how the call is treated is the callee, which is *by definition* a
> PSAP.
>
> Two cases, two sets of rules (one intentionally fuzzy, one crystal
> clear).  Done.
>
> --Martin
>


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Would a comment in the service provider block and a comment in the 
PIDF be directed at different uses? Likely I'm misunderstanding one, 
the other, or both.  I read Brian's note on adding a comment to the 
service provider block as a way for a service provider to add 
free-form information to, for example, the contact info for the 
service provider ("For non-emergency requests, call the listed 
administrative number and ask for Marge; if it's an emergency, call 
the listed mobile number").  A comment in the PIDF-LO would be a way 
to make a remark regarding the location.

At 6:30 PM -0400 8/9/12, Brian Rosen wrote:

>  Well, I think we want entities other than an access network to be 
> able to use a comment, so the latter of your two answers is what I 
> would say.
>
>  If there is a comment in additional-data, I don't think we need 
> another in PIDF.
>
>  Brian
>
>  On Aug 9, 2012, at 5:28 PM, Matt Serra <mserra@ravemobilesafety.com> wrote:
>
>>  Brian -
>>
>>  No objection, but a question:
>>
>>  We mentioned possibly putting this field into the PIDF instead. 
>> Did we arrive on putting this into the Add'l Call Data to keep the 
>> PIDF "clean" assuming it has no alternate use outside of 9-1-1?
>>
>>  I suspect the driver is also based on whether the "Comment" is 
>> related to the address, or the provider/service as well.
>>
>>  Thanks.
>>
>>  -----Original Message-----
>>  From: Rosen, Brian [mailto:Brian.Rosen@neustar.biz]
>>  Sent: Thursday, August 09, 2012 11:42 AM
>>  To: ecrit@ietf.org Org
>>  Subject: [Ecrit] comment field in additional-data
>>
>>  Would there be any objection to adding a field in the service 
>> provider info block for a comment?
>>  I'm asking because we found a backwards compatibility issue in 
>> NENA, but I think it's generally useful.  There are always a 
>> couple of things it may be helpful to tell the call taker (human). 
>> I'd put cautionary text in that suggests using an extension 
>> mechanism to pass actual data intended to be consumed by an 
>> automaton.  This is just for free text to be displayed to a call 
>> taker or other PSAP staff.
>>
>>
>>
>>  _______________________________________________
>>  Ecrit mailing list
>>  Ecrit@ietf.org
>>  https://www.ietf.org/mailman/listinfo/ecrit
>
>  _______________________________________________
>  Ecrit mailing list
>  Ecrit@ietf.org
>  https://www.ietf.org/mailman/listinfo/ecrit


-- 
Randall Gellens
Opinions are personal;    facts are suspect;    I speak for myself only
-------------- Randomly selected tag: ---------------
Boling's postulate:
    If you're feeling good, don't worry.  You'll get over it.

From brian.rosen@neustar.biz  Thu Aug 30 12:18:07 2012
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From: "Rosen, Brian" <Brian.Rosen@neustar.biz>
To: "ecrit@ietf.org Org" <ecrit@ietf.org>
Date: Thu, 30 Aug 2012 15:17:58 -0400
Thread-Topic: Ids in LoST
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Subject: [Ecrit] Ids in LoST
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In NENA, we're interested in being able to log queries on the LoST server, =
and relate them to the call.  There isn't any way to do that - the LoST ser=
ver doesn't know the  call id or incident id.

Here is a specific use:
We use a LoST server inside our Emergency Services IP network to route to t=
he proper responders based on the location of the caller.  The PSAP queries=
 using LoST and a special service URN to get the URI of the appropriate fir=
e brigade that serves the location of the incident.  The client (the PSAP) =
and the LoST server both log the query and response, and if the query recur=
s (because, for example, the call is answered out of area, and the local Lo=
ST server isn't authoritative for the incident location), the recursion is =
logged along the path by each step.

If something goes wrong, we want to be able to search the logger for all ev=
ents that occurred for a particular call or incident (we have two identifie=
rs, since we can have multiple calls about the same incident).  The problem=
, of course, is while the PSAP knows the call and incident IDs, the LoST se=
rvers don't.  So when they log the query and response, they can't annotate =
the log record appropriately. =20

Most emergency systems have stringent logging requirements like this.

If the LoST server has to recursively query another LoST server, we have es=
sentially the same problem - no way to relate the queries as we trace them =
through the network.

What would be helpful is to have an id passed in the query which is returne=
d in the response, and also passed on in the recursive query (and thus pass=
ed back in the recursive response).

We would like the ID to be typed (that is, we need to know it's a NENA call=
 id), so what we are thinking of is an optional extension to LoST that pass=
es and ID and an id type (which is listed in a registry).  We would like to=
 be able to have more than one.  The server is only asked to include it (or=
 them if it there are more than one of them) in the response, and in any re=
cursive query.

If this seems reasonable, I will write a draft.  If IETF won't, NENA can al=
ways do a private extension.  Seems like a generally useful capability.

Example
<id type=3Dnena.call>4547s8gs889</id>


Brian


From dmarnold@verizon.net  Thu Aug 30 12:22:25 2012
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From: "Delaine Arnold ENP" <dmarnold@verizon.net>
To: <ecrit@ietf.org>
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Subject: Re: [Ecrit] comment field in additional-data
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PIDF-LO already has a LOC (Additional Location Information).  Why won't =
that
work?

Thank you,
Delaine
---------------------------------------
Delaine M. Arnold, ENP
NENA Data Structures Sub-Committee Chair
Voice:=A0 813-960-1698
Cell:=A0=A0=A0=A0 813-928-1692
Email:=A0 dmarnold@verizon.net

-----Original Message-----
From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On Behalf =
Of
Randall Gellens
Sent: Thursday, August 30, 2012 2:52 PM
To: Rosen, Brian; Matt Serra
Cc: Rosen, Brian; ecrit@ietf.org Org
Subject: Re: [Ecrit] comment field in additional-data

Would a comment in the service provider block and a comment in the PIDF =
be
directed at different uses? Likely I'm misunderstanding one, the other, =
or
both.  I read Brian's note on adding a comment to the service provider =
block
as a way for a service provider to add free-form information to, for
example, the contact info for the service provider ("For non-emergency
requests, call the listed administrative number and ask for Marge; if =
it's
an emergency, call the listed mobile number").  A comment in the PIDF-LO
would be a way to make a remark regarding the location.

At 6:30 PM -0400 8/9/12, Brian Rosen wrote:

>  Well, I think we want entities other than an access network to be=20
> able to use a comment, so the latter of your two answers is what I=20
> would say.
>
>  If there is a comment in additional-data, I don't think we need=20
> another in PIDF.
>
>  Brian
>
>  On Aug 9, 2012, at 5:28 PM, Matt Serra <mserra@ravemobilesafety.com>
wrote:
>
>>  Brian -
>>
>>  No objection, but a question:
>>
>>  We mentioned possibly putting this field into the PIDF instead.=20
>> Did we arrive on putting this into the Add'l Call Data to keep the=20
>> PIDF "clean" assuming it has no alternate use outside of 9-1-1?
>>
>>  I suspect the driver is also based on whether the "Comment" is=20
>> related to the address, or the provider/service as well.
>>
>>  Thanks.
>>
>>  -----Original Message-----
>>  From: Rosen, Brian [mailto:Brian.Rosen@neustar.biz]
>>  Sent: Thursday, August 09, 2012 11:42 AM
>>  To: ecrit@ietf.org Org
>>  Subject: [Ecrit] comment field in additional-data
>>
>>  Would there be any objection to adding a field in the service=20
>> provider info block for a comment?
>>  I'm asking because we found a backwards compatibility issue in NENA, =

>> but I think it's generally useful.  There are always a couple of=20
>> things it may be helpful to tell the call taker (human).
>> I'd put cautionary text in that suggests using an extension mechanism =

>> to pass actual data intended to be consumed by an automaton.  This is =

>> just for free text to be displayed to a call taker or other PSAP=20
>> staff.
>>
>>
>>
>>  _______________________________________________
>>  Ecrit mailing list
>>  Ecrit@ietf.org
>>  https://www.ietf.org/mailman/listinfo/ecrit
>
>  _______________________________________________
>  Ecrit mailing list
>  Ecrit@ietf.org
>  https://www.ietf.org/mailman/listinfo/ecrit


--
Randall Gellens
Opinions are personal;    facts are suspect;    I speak for myself only
-------------- Randomly selected tag: --------------- Boling's =
postulate:
    If you're feeling good, don't worry.  You'll get over it.
_______________________________________________
Ecrit mailing list
Ecrit@ietf.org
https://www.ietf.org/mailman/listinfo/ecrit


From randy@qualcomm.com  Thu Aug 30 13:55:54 2012
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Subject: Re: [Ecrit] Ids in LoST
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At 3:17 PM -0400 8/30/12, Brian Rosen wrote:

>  What would be helpful is to have an id passed in the query which is 
> returned in the response, and also passed on in the recursive query 
> (and thus passed back in the recursive response).
>
>  We would like the ID to be typed (that is, we need to know it's a 
> NENA call id), so what we are thinking of is an optional extension 
> to LoST that passes and ID and an id type (which is listed in a 
> registry).  We would like to be able to have more than one.  The 
> server is only asked to include it (or them if it there are more 
> than one of them) in the response, and in any recursive query.
>
>  If this seems reasonable, I will write a draft.

This seems both generally useful and harmless.  Useful for the 
specific case Brian described, but also because in general it's 
useful to be able to pass strings around that are only for logging 
(e.g., trace fields in SMTP message format).  Harmless because it's 
an optional field that doesn't alter the protocol and doesn't affect 
behavior.

-- 
Randall Gellens
Opinions are personal;    facts are suspect;    I speak for myself only
-------------- Randomly selected tag: ---------------
I have made this letter longer than usual because I lack the
time to make it shorter.                     --Blaise Pascal

From mserra@ravemobilesafety.com  Thu Aug 30 14:31:40 2012
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From: Matt Serra <mserra@ravemobilesafety.com>
To: Randall Gellens <randy@qualcomm.com>, "Rosen, Brian" <Brian.Rosen@neustar.biz>
Date: Thu, 30 Aug 2012 16:31:25 -0500
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I'll respond, as I think I'm responsible for the confusion.

Brian proposes that this new "Comment" field appear ONLY within the Additio=
nal-Data Service Provider Block and NOT within the PIDF.  This way, anyone =
can populate the "Comment" field.  If it were in the PIDF, only access netw=
orks could populate the new "Comment" field.

I think this field should only be used to provide incremental comments abou=
t the Service Provider, or the Services Provided, and NOT about the locatio=
n.  It would be better to carry information about the location in a separat=
e Call-Info header having the Purpose parameter set to 'emergencyLocationDa=
ta' (at least this is what is documented in the NENA i3 specification).

Matt.


-----Original Message-----
From: Randall Gellens [mailto:randy@qualcomm.com]=20
Sent: Thursday, August 30, 2012 2:52 PM
To: Rosen, Brian; Matt Serra
Cc: Rosen, Brian; ecrit@ietf.org Org
Subject: Re: [Ecrit] comment field in additional-data

Would a comment in the service provider block and a comment in the PIDF be =
directed at different uses? Likely I'm misunderstanding one, the other, or =
both.  I read Brian's note on adding a comment to the service provider bloc=
k as a way for a service provider to add free-form information to, for exam=
ple, the contact info for the service provider ("For non-emergency requests=
, call the listed administrative number and ask for Marge; if it's an emerg=
ency, call the listed mobile number").  A comment in the PIDF-LO would be a=
 way to make a remark regarding the location.

At 6:30 PM -0400 8/9/12, Brian Rosen wrote:

>  Well, I think we want entities other than an access network to be=20
> able to use a comment, so the latter of your two answers is what I=20
> would say.
>
>  If there is a comment in additional-data, I don't think we need=20
> another in PIDF.
>
>  Brian
>
>  On Aug 9, 2012, at 5:28 PM, Matt Serra <mserra@ravemobilesafety.com> wro=
te:
>
>>  Brian -
>>
>>  No objection, but a question:
>>
>>  We mentioned possibly putting this field into the PIDF instead.=20
>> Did we arrive on putting this into the Add'l Call Data to keep the=20
>> PIDF "clean" assuming it has no alternate use outside of 9-1-1?
>>
>>  I suspect the driver is also based on whether the "Comment" is=20
>> related to the address, or the provider/service as well.
>>
>>  Thanks.
>>
>>  -----Original Message-----
>>  From: Rosen, Brian [mailto:Brian.Rosen@neustar.biz]
>>  Sent: Thursday, August 09, 2012 11:42 AM
>>  To: ecrit@ietf.org Org
>>  Subject: [Ecrit] comment field in additional-data
>>
>>  Would there be any objection to adding a field in the service=20
>> provider info block for a comment?
>>  I'm asking because we found a backwards compatibility issue in NENA,=20
>> but I think it's generally useful.  There are always a couple of=20
>> things it may be helpful to tell the call taker (human).
>> I'd put cautionary text in that suggests using an extension mechanism=20
>> to pass actual data intended to be consumed by an automaton.  This is=20
>> just for free text to be displayed to a call taker or other PSAP=20
>> staff.
>>
>>
>>
>>  _______________________________________________
>>  Ecrit mailing list
>>  Ecrit@ietf.org
>>  https://www.ietf.org/mailman/listinfo/ecrit
>
>  _______________________________________________
>  Ecrit mailing list
>  Ecrit@ietf.org
>  https://www.ietf.org/mailman/listinfo/ecrit


--
Randall Gellens
Opinions are personal;    facts are suspect;    I speak for myself only
-------------- Randomly selected tag: --------------- Boling's postulate:
    If you're feeling good, don't worry.  You'll get over it.

From brian.rosen@neustar.biz  Thu Aug 30 15:19:37 2012
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From: "Rosen, Brian" <Brian.Rosen@neustar.biz>
To: Matt Serra <mserra@ravemobilesafety.com>
Date: Thu, 30 Aug 2012 18:19:33 -0400
Thread-Topic: [Ecrit] comment field in additional-data
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Cc: Randall Gellens <randy@qualcomm.com>, "Rosen, Brian" <Brian.Rosen@neustar.biz>, "ecrit@ietf.org Org" <ecrit@ietf.org>
Subject: Re: [Ecrit] comment field in additional-data
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Please let's not get additional location data confused with this.

The request is for free text from a service provider in the path of an emer=
gency call, or in the case of a PIDF, the author of a PIDF. =20

"Additional Location Data" is defined by NENA as information specific to a =
location (not a PIDF, but the location the PIDF represents).  It has things=
 like floor plans, tenant/building owner contact data, elevator status, .. =
 It probably could use a comment field, but it's an entirely separate data =
structure, not defined in this document.

Brian

On Aug 30, 2012, at 5:31 PM, Matt Serra <mserra@ravemobilesafety.com> wrote=
:

> I'll respond, as I think I'm responsible for the confusion.
>=20
> Brian proposes that this new "Comment" field appear ONLY within the Addit=
ional-Data Service Provider Block and NOT within the PIDF.  This way, anyon=
e can populate the "Comment" field.  If it were in the PIDF, only access ne=
tworks could populate the new "Comment" field.
>=20
> I think this field should only be used to provide incremental comments ab=
out the Service Provider, or the Services Provided, and NOT about the locat=
ion.  It would be better to carry information about the location in a separ=
ate Call-Info header having the Purpose parameter set to 'emergencyLocation=
Data' (at least this is what is documented in the NENA i3 specification).
>=20
> Matt.
>=20
>=20
> -----Original Message-----
> From: Randall Gellens [mailto:randy@qualcomm.com]=20
> Sent: Thursday, August 30, 2012 2:52 PM
> To: Rosen, Brian; Matt Serra
> Cc: Rosen, Brian; ecrit@ietf.org Org
> Subject: Re: [Ecrit] comment field in additional-data
>=20
> Would a comment in the service provider block and a comment in the PIDF b=
e directed at different uses? Likely I'm misunderstanding one, the other, o=
r both.  I read Brian's note on adding a comment to the service provider bl=
ock as a way for a service provider to add free-form information to, for ex=
ample, the contact info for the service provider ("For non-emergency reques=
ts, call the listed administrative number and ask for Marge; if it's an eme=
rgency, call the listed mobile number").  A comment in the PIDF-LO would be=
 a way to make a remark regarding the location.
>=20
> At 6:30 PM -0400 8/9/12, Brian Rosen wrote:
>=20
>> Well, I think we want entities other than an access network to be=20
>> able to use a comment, so the latter of your two answers is what I=20
>> would say.
>>=20
>> If there is a comment in additional-data, I don't think we need=20
>> another in PIDF.
>>=20
>> Brian
>>=20
>> On Aug 9, 2012, at 5:28 PM, Matt Serra <mserra@ravemobilesafety.com> wro=
te:
>>=20
>>> Brian -
>>>=20
>>> No objection, but a question:
>>>=20
>>> We mentioned possibly putting this field into the PIDF instead.=20
>>> Did we arrive on putting this into the Add'l Call Data to keep the=20
>>> PIDF "clean" assuming it has no alternate use outside of 9-1-1?
>>>=20
>>> I suspect the driver is also based on whether the "Comment" is=20
>>> related to the address, or the provider/service as well.
>>>=20
>>> Thanks.
>>>=20
>>> -----Original Message-----
>>> From: Rosen, Brian [mailto:Brian.Rosen@neustar.biz]
>>> Sent: Thursday, August 09, 2012 11:42 AM
>>> To: ecrit@ietf.org Org
>>> Subject: [Ecrit] comment field in additional-data
>>>=20
>>> Would there be any objection to adding a field in the service=20
>>> provider info block for a comment?
>>> I'm asking because we found a backwards compatibility issue in NENA,=20
>>> but I think it's generally useful.  There are always a couple of=20
>>> things it may be helpful to tell the call taker (human).
>>> I'd put cautionary text in that suggests using an extension mechanism=20
>>> to pass actual data intended to be consumed by an automaton.  This is=20
>>> just for free text to be displayed to a call taker or other PSAP=20
>>> staff.
>>>=20
>>>=20
>>>=20
>>> _______________________________________________
>>> Ecrit mailing list
>>> Ecrit@ietf.org
>>> https://www.ietf.org/mailman/listinfo/ecrit
>>=20
>> _______________________________________________
>> Ecrit mailing list
>> Ecrit@ietf.org
>> https://www.ietf.org/mailman/listinfo/ecrit
>=20
>=20
> --
> Randall Gellens
> Opinions are personal;    facts are suspect;    I speak for myself only
> -------------- Randomly selected tag: --------------- Boling's postulate:
>    If you're feeling good, don't worry.  You'll get over it.
> _______________________________________________
> Ecrit mailing list
> Ecrit@ietf.org
> https://www.ietf.org/mailman/listinfo/ecrit


From James.Winterbottom@commscope.com  Thu Aug 30 16:23:53 2012
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From: "Winterbottom, James" <James.Winterbottom@commscope.com>
To: "Rosen, Brian" <Brian.Rosen@neustar.biz>, "ecrit@ietf.org Org" <ecrit@ietf.org>
Date: Fri, 31 Aug 2012 07:23:45 +0800
Thread-Topic: Ids in LoST
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I understand why it is wanted. I agree that it is probably useful once you =
are inside the ESInet, but I understood the current charter to be limited t=
o getting us to the ESInet.
I think that this kind of extension would be better done inside NENA.

Cheers
James


-----Original Message-----
From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On Behalf Of R=
osen, Brian
Sent: Friday, 31 August 2012 5:18 AM
To: ecrit@ietf.org Org
Subject: [Ecrit] Ids in LoST

In NENA, we're interested in being able to log queries on the LoST server, =
and relate them to the call.  There isn't any way to do that - the LoST ser=
ver doesn't know the  call id or incident id.

Here is a specific use:
We use a LoST server inside our Emergency Services IP network to route to t=
he proper responders based on the location of the caller.  The PSAP queries=
 using LoST and a special service URN to get the URI of the appropriate fir=
e brigade that serves the location of the incident.  The client (the PSAP) =
and the LoST server both log the query and response, and if the query recur=
s (because, for example, the call is answered out of area, and the local Lo=
ST server isn't authoritative for the incident location), the recursion is =
logged along the path by each step.

If something goes wrong, we want to be able to search the logger for all ev=
ents that occurred for a particular call or incident (we have two identifie=
rs, since we can have multiple calls about the same incident).  The problem=
, of course, is while the PSAP knows the call and incident IDs, the LoST se=
rvers don't.  So when they log the query and response, they can't annotate =
the log record appropriately. =20

Most emergency systems have stringent logging requirements like this.

If the LoST server has to recursively query another LoST server, we have es=
sentially the same problem - no way to relate the queries as we trace them =
through the network.

What would be helpful is to have an id passed in the query which is returne=
d in the response, and also passed on in the recursive query (and thus pass=
ed back in the recursive response).

We would like the ID to be typed (that is, we need to know it's a NENA call=
 id), so what we are thinking of is an optional extension to LoST that pass=
es and ID and an id type (which is listed in a registry).  We would like to=
 be able to have more than one.  The server is only asked to include it (or=
 them if it there are more than one of them) in the response, and in any re=
cursive query.

If this seems reasonable, I will write a draft.  If IETF won't, NENA can al=
ways do a private extension.  Seems like a generally useful capability.

Example
<id type=3Dnena.call>4547s8gs889</id>


Brian

_______________________________________________
Ecrit mailing list
Ecrit@ietf.org
https://www.ietf.org/mailman/listinfo/ecrit

From dmarnold@verizon.net  Thu Aug 30 18:53:16 2012
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From: Delaine Arnold-ENP <dmarnold@verizon.net>
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Subject: Re: [Ecrit] comment field in additional-data
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Brian,

PIDF-LO has a field with a tag of LOC.  There is also Additional Data Associated with a Location.
These are 2 separate things.

I thought LOC was for the SP to use to populate anything they wanted, while Additional Data Associated with a Location is just what you indicated - floor plans, or any specific details about the location being responded to.

Since SPs/devices create PIDF-LO, why can't these additional comments from the SP be in the LOC data element?

Thank you,
Delaine
---------------------------------------
Delaine M. Arnold
Voice:  813-960-1698
Cell:     813-928-1692
Email:  dmarnold@verizon.net



Aug 30, 2012 06:19:54 PM, Brian.Rosen@neustar.biz wrote:

===========================================

Please let's not get additional location data confused with this.

The request is for free text from a service provider in the path of an emergency call, or in the case of a PIDF, the author of a PIDF.  

"Additional Location Data" is defined by NENA as information specific to a location (not a PIDF, but the location the PIDF represents).  It has things like floor plans, tenant/building owner contact data, elevator status, ..  It probably could use a comment field, but it's an entirely separate data structure, not defined in this document.

Brian

On Aug 30, 2012, at 5:31 PM, Matt Serra  wrote:

> I'll respond, as I think I'm responsible for the confusion.
> 
> Brian proposes that this new "Comment" field appear ONLY within the Additional-Data Service Provider Block and NOT within the PIDF.  This way, anyone can populate the "Comment" field.  If it were in the PIDF, only access networks could populate the new "Comment" field.
> 
> I think this field should only be used to provide incremental comments about the Service Provider, or the Services Provided, and NOT about the location.  It would be better to carry information about the location in a separate Call-Info header having the Purpose parameter set to 'emergencyLocationData' (at least this is what is documented in the NENA i3 specification).
> 
> Matt.
> 
> 
> -----Original Message-----
> From: Randall Gellens [mailto:randy@qualcomm.com] 
> Sent: Thursday, August 30, 2012 2:52 PM
> To: Rosen, Brian; Matt Serra
> Cc: Rosen, Brian; ecrit@ietf.org Org
> Subject: Re: [Ecrit] comment field in additional-data
> 
> Would a comment in the service provider block and a comment in the PIDF be directed at different uses? Likely I'm misunderstanding one, the other, or both.  I read Brian's note on adding a comment to the service provider block as a way for a service provider to add free-form information to, for example, the contact info for the service provider ("For non-emergency requests, call the listed administrative number and ask for Marge; if it's an emergency, call the listed mobile number").  A comment in the PIDF-LO would be a way to make a remark regarding the location.
> 
> At 6:30 PM -0400 8/9/12, Brian Rosen wrote:
> 
>> Well, I think we want entities other than an access network to be 
>> able to use a comment, so the latter of your two answers is what I 
>> would say.
>> 
>> If there is a comment in additional-data, I don't think we need 
>> another in PIDF.
>> 
>> Brian
>> 
>> On Aug 9, 2012, at 5:28 PM, Matt Serra  wrote:
>> 
>>> Brian -
>>> 
>>> No objection, but a question:
>>> 
>>> We mentioned possibly putting this field into the PIDF instead. 
>>> Did we arrive on putting this into the Add'l Call Data to keep the 
>>> PIDF "clean" assuming it has no alternate use outside of 9-1-1?
>>> 
>>> I suspect the driver is also based on whether the "Comment" is 
>>> related to the address, or the provider/service as well.
>>> 
>>> Thanks.
>>> 
>>> -----Original Message-----
>>> From: Rosen, Brian [mailto:Brian.Rosen@neustar.biz]
>>> Sent: Thursday, August 09, 2012 11:42 AM
>>> To: ecrit@ietf.org Org
>>> Subject: [Ecrit] comment field in additional-data
>>> 
>>> Would there be any objection to adding a field in the service 
>>> provider info block for a comment?
>>> I'm asking because we found a backwards compatibility issue in NENA, 
>>> but I think it's generally useful.  There are always a couple of 
>>> things it may be helpful to tell the call taker (human).
>>> I'd put cautionary text in that suggests using an extension mechanism 
>>> to pass actual data intended to be consumed by an automaton.  This is 
>>> just for free text to be displayed to a call taker or other PSAP 
>>> staff.
>>> 
>>> 
>>> 
>>> _______________________________________________
>>> Ecrit mailing list
>>> Ecrit@ietf.org
>>> https://www.ietf.org/mailman/listinfo/ecrit
>> 
>> _______________________________________________
>> Ecrit mailing list
>> Ecrit@ietf.org
>> https://www.ietf.org/mailman/listinfo/ecrit
> 
> 
> --
> Randall Gellens
> Opinions are personal;    facts are suspect;    I speak for myself only
> -------------- Randomly selected tag: --------------- Boling's postulate:
>    If you're feeling good, don't worry.  You'll get over it.
> _______________________________________________
> Ecrit mailing list
> Ecrit@ietf.org
> https://www.ietf.org/mailman/listinfo/ecrit

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From mserra@ravemobilesafety.com  Thu Aug 30 18:59:50 2012
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From: Matt Serra <mserra@ravemobilesafety.com>
To: "Rosen, Brian" <Brian.Rosen@neustar.biz>
Date: Thu, 30 Aug 2012 20:59:43 -0500
Thread-Topic: [Ecrit] comment field in additional-data
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Cc: Randall Gellens <randy@qualcomm.com>, "Rosen, Brian" <Brian.Rosen@neustar.biz>, "ecrit@ietf.org Org" <ecrit@ietf.org>
Subject: Re: [Ecrit] comment field in additional-data
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Agreed.  I was trying to address Randall's remark about using a comment in =
the PIDF to "to make a remark regarding location" - which is best left to B=
rian's definition of Additional Location Data.=20



On Aug 30, 2012, at 6:19 PM, "Rosen, Brian" <Brian.Rosen@neustar.biz> wrote=
:

> Please let's not get additional location data confused with this.
>=20
> The request is for free text from a service provider in the path of an em=
ergency call, or in the case of a PIDF, the author of a PIDF. =20
>=20
> "Additional Location Data" is defined by NENA as information specific to =
a location (not a PIDF, but the location the PIDF represents).  It has thin=
gs like floor plans, tenant/building owner contact data, elevator status, .=
.  It probably could use a comment field, but it's an entirely separate dat=
a structure, not defined in this document.
>=20
> Brian
>=20
> On Aug 30, 2012, at 5:31 PM, Matt Serra <mserra@ravemobilesafety.com> wro=
te:
>=20
>> I'll respond, as I think I'm responsible for the confusion.
>>=20
>> Brian proposes that this new "Comment" field appear ONLY within the Addi=
tional-Data Service Provider Block and NOT within the PIDF.  This way, anyo=
ne can populate the "Comment" field.  If it were in the PIDF, only access n=
etworks could populate the new "Comment" field.
>>=20
>> I think this field should only be used to provide incremental comments a=
bout the Service Provider, or the Services Provided, and NOT about the loca=
tion.  It would be better to carry information about the location in a sepa=
rate Call-Info header having the Purpose parameter set to 'emergencyLocatio=
nData' (at least this is what is documented in the NENA i3 specification).
>>=20
>> Matt.
>>=20
>>=20
>> -----Original Message-----
>> From: Randall Gellens [mailto:randy@qualcomm.com]=20
>> Sent: Thursday, August 30, 2012 2:52 PM
>> To: Rosen, Brian; Matt Serra
>> Cc: Rosen, Brian; ecrit@ietf.org Org
>> Subject: Re: [Ecrit] comment field in additional-data
>>=20
>> Would a comment in the service provider block and a comment in the PIDF =
be directed at different uses? Likely I'm misunderstanding one, the other, =
or both.  I read Brian's note on adding a comment to the service provider b=
lock as a way for a service provider to add free-form information to, for e=
xample, the contact info for the service provider ("For non-emergency reque=
sts, call the listed administrative number and ask for Marge; if it's an em=
ergency, call the listed mobile number").  A comment in the PIDF-LO would b=
e a way to make a remark regarding the location.
>>=20
>> At 6:30 PM -0400 8/9/12, Brian Rosen wrote:
>>=20
>>> Well, I think we want entities other than an access network to be=20
>>> able to use a comment, so the latter of your two answers is what I=20
>>> would say.
>>>=20
>>> If there is a comment in additional-data, I don't think we need=20
>>> another in PIDF.
>>>=20
>>> Brian
>>>=20
>>> On Aug 9, 2012, at 5:28 PM, Matt Serra <mserra@ravemobilesafety.com> wr=
ote:
>>>=20
>>>> Brian -
>>>>=20
>>>> No objection, but a question:
>>>>=20
>>>> We mentioned possibly putting this field into the PIDF instead.=20
>>>> Did we arrive on putting this into the Add'l Call Data to keep the=20
>>>> PIDF "clean" assuming it has no alternate use outside of 9-1-1?
>>>>=20
>>>> I suspect the driver is also based on whether the "Comment" is=20
>>>> related to the address, or the provider/service as well.
>>>>=20
>>>> Thanks.
>>>>=20
>>>> -----Original Message-----
>>>> From: Rosen, Brian [mailto:Brian.Rosen@neustar.biz]
>>>> Sent: Thursday, August 09, 2012 11:42 AM
>>>> To: ecrit@ietf.org Org
>>>> Subject: [Ecrit] comment field in additional-data
>>>>=20
>>>> Would there be any objection to adding a field in the service=20
>>>> provider info block for a comment?
>>>> I'm asking because we found a backwards compatibility issue in NENA,=20
>>>> but I think it's generally useful.  There are always a couple of=20
>>>> things it may be helpful to tell the call taker (human).
>>>> I'd put cautionary text in that suggests using an extension mechanism=
=20
>>>> to pass actual data intended to be consumed by an automaton.  This is=
=20
>>>> just for free text to be displayed to a call taker or other PSAP=20
>>>> staff.
>>>>=20
>>>>=20
>>>>=20
>>>> _______________________________________________
>>>> Ecrit mailing list
>>>> Ecrit@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/ecrit
>>>=20
>>> _______________________________________________
>>> Ecrit mailing list
>>> Ecrit@ietf.org
>>> https://www.ietf.org/mailman/listinfo/ecrit
>>=20
>>=20
>> --
>> Randall Gellens
>> Opinions are personal;    facts are suspect;    I speak for myself only
>> -------------- Randomly selected tag: --------------- Boling's postulate=
:
>>   If you're feeling good, don't worry.  You'll get over it.
>> _______________________________________________
>> Ecrit mailing list
>> Ecrit@ietf.org
>> https://www.ietf.org/mailman/listinfo/ecrit
>=20

From James.Winterbottom@commscope.com  Thu Aug 30 19:05:17 2012
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From: "Winterbottom, James" <James.Winterbottom@commscope.com>
To: "dmarnold@verizon.net" <dmarnold@verizon.net>, "Brian.Rosen@neustar.biz" <Brian.Rosen@neustar.biz>
Date: Fri, 31 Aug 2012 10:05:07 +0800
Thread-Topic: [Ecrit] comment field in additional-data
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Cc: "randy@qualcomm.com" <randy@qualcomm.com>, "mserra@ravemobilesafety.com" <mserra@ravemobilesafety.com>, "ecrit@ietf.org" <ecrit@ietf.org>
Subject: Re: [Ecrit] comment field in additional-data
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Delaine,

What if I want to include the extra information that Brian is talking about=
 but the location itself is geodetic?

If the information is not specifically location information then it doesn't=
 belong in the civic or geodetic data set.

Cheers
James

-----Original Message-----
From: ecrit-bounces@ietf.org [mailto:ecrit-bounces@ietf.org] On Behalf Of D=
elaine Arnold-ENP
Sent: Friday, 31 August 2012 11:53 AM
To: Brian.Rosen@neustar.biz
Cc: randy@qualcomm.com; Brian.Rosen@neustar.biz; mserra@ravemobilesafety.co=
m; ecrit@ietf.org
Subject: Re: [Ecrit] comment field in additional-data

Brian,

PIDF-LO has a field with a tag of LOC.  There is also Additional Data Assoc=
iated with a Location.
These are 2 separate things.

I thought LOC was for the SP to use to populate anything they wanted, while=
 Additional Data Associated with a Location is just what you indicated - fl=
oor plans, or any specific details about the location being responded to.

Since SPs/devices create PIDF-LO, why can't these additional comments from =
the SP be in the LOC data element?

Thank you,
Delaine
---------------------------------------
Delaine M. Arnold
Voice:  813-960-1698
Cell:     813-928-1692
Email:  dmarnold@verizon.net



Aug 30, 2012 06:19:54 PM, Brian.Rosen@neustar.biz wrote:

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

Please let's not get additional location data confused with this.

The request is for free text from a service provider in the path of an emer=
gency call, or in the case of a PIDF, the author of a PIDF. =20

"Additional Location Data" is defined by NENA as information specific to a =
location (not a PIDF, but the location the PIDF represents).  It has things=
 like floor plans, tenant/building owner contact data, elevator status, .. =
 It probably could use a comment field, but it's an entirely separate data =
structure, not defined in this document.

Brian

On Aug 30, 2012, at 5:31 PM, Matt Serra  wrote:

> I'll respond, as I think I'm responsible for the confusion.
>=20
> Brian proposes that this new "Comment" field appear ONLY within the Addit=
ional-Data Service Provider Block and NOT within the PIDF.  This way, anyon=
e can populate the "Comment" field.  If it were in the PIDF, only access ne=
tworks could populate the new "Comment" field.
>=20
> I think this field should only be used to provide incremental comments ab=
out the Service Provider, or the Services Provided, and NOT about the locat=
ion.  It would be better to carry information about the location in a separ=
ate Call-Info header having the Purpose parameter set to 'emergencyLocation=
Data' (at least this is what is documented in the NENA i3 specification).
>=20
> Matt.
>=20
>=20
> -----Original Message-----
> From: Randall Gellens [mailto:randy@qualcomm.com]
> Sent: Thursday, August 30, 2012 2:52 PM
> To: Rosen, Brian; Matt Serra
> Cc: Rosen, Brian; ecrit@ietf.org Org
> Subject: Re: [Ecrit] comment field in additional-data
>=20
> Would a comment in the service provider block and a comment in the PIDF b=
e directed at different uses? Likely I'm misunderstanding one, the other, o=
r both.  I read Brian's note on adding a comment to the service provider bl=
ock as a way for a service provider to add free-form information to, for ex=
ample, the contact info for the service provider ("For non-emergency reques=
ts, call the listed administrative number and ask for Marge; if it's an eme=
rgency, call the listed mobile number").  A comment in the PIDF-LO would be=
 a way to make a remark regarding the location.
>=20
> At 6:30 PM -0400 8/9/12, Brian Rosen wrote:
>=20
>> Well, I think we want entities other than an access network to be=20
>> able to use a comment, so the latter of your two answers is what I=20
>> would say.
>>=20
>> If there is a comment in additional-data, I don't think we need=20
>> another in PIDF.
>>=20
>> Brian
>>=20
>> On Aug 9, 2012, at 5:28 PM, Matt Serra  wrote:
>>=20
>>> Brian -
>>>=20
>>> No objection, but a question:
>>>=20
>>> We mentioned possibly putting this field into the PIDF instead.=20
>>> Did we arrive on putting this into the Add'l Call Data to keep the=20
>>> PIDF "clean" assuming it has no alternate use outside of 9-1-1?
>>>=20
>>> I suspect the driver is also based on whether the "Comment" is=20
>>> related to the address, or the provider/service as well.
>>>=20
>>> Thanks.
>>>=20
>>> -----Original Message-----
>>> From: Rosen, Brian [mailto:Brian.Rosen@neustar.biz]
>>> Sent: Thursday, August 09, 2012 11:42 AM
>>> To: ecrit@ietf.org Org
>>> Subject: [Ecrit] comment field in additional-data
>>>=20
>>> Would there be any objection to adding a field in the service=20
>>> provider info block for a comment?
>>> I'm asking because we found a backwards compatibility issue in NENA,=20
>>> but I think it's generally useful.  There are always a couple of=20
>>> things it may be helpful to tell the call taker (human).
>>> I'd put cautionary text in that suggests using an extension=20
>>> mechanism to pass actual data intended to be consumed by an=20
>>> automaton.  This is just for free text to be displayed to a call=20
>>> taker or other PSAP staff.
>>>=20
>>>=20
>>>=20
>>> _______________________________________________
>>> Ecrit mailing list
>>> Ecrit@ietf.org
>>> https://www.ietf.org/mailman/listinfo/ecrit
>>=20
>> _______________________________________________
>> Ecrit mailing list
>> Ecrit@ietf.org
>> https://www.ietf.org/mailman/listinfo/ecrit
>=20
>=20
> --
> Randall Gellens
> Opinions are personal;    facts are suspect;    I speak for myself only
> -------------- Randomly selected tag: --------------- Boling's postulate:
>    If you're feeling good, don't worry.  You'll get over it.
> _______________________________________________
> Ecrit mailing list
> Ecrit@ietf.org
> https://www.ietf.org/mailman/listinfo/ecrit

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Ecrit@ietf.org
https://www.ietf.org/mailman/listinfo/ecrit
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