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Thread-Topic: Scope of *rn* parameter in the context of LNP
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From: "Yu, James" <james.yu@neustar.biz>
To: <chelliah@cisco.com>
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Cc: iptel@ietf.org, Gonzalo.Camarillo@Ericsson.com,
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Subject: [Iptel] RE: Scope of *rn* parameter in the context of LNP
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Chelliah,
=20
I checked RFC3398.   Yes, you detected an inconsistency between RFC3398 =
and my I-D.
=20
RFC3398 references my I-D that is not yet a RFC.   My current I-D does =
not use "npdi=3Dyes" (just "npdi") and the "rn" is either a global-rn =
(global routing number)  or local-rn (e.g., national number with +1 in =
the rn-context).
=20
RFC3398 needs to be corrected.
=20
James

-----Original Message-----
From: Chelliah Sivachelvan (chelliah) [mailto:chelliah@cisco.com]
Sent: Wednesday, March 30, 2005 12:05 PM
To: chelliah@cisco.com; Yu, James
Cc: iptel@ietf.org; Gonzalo.Camarillo@Ericsson.com; Peterson, Jon
Subject: RE: Scope of *rn* parameter in the context of LNP


Correction: The referenced RFC is 3398 not 3388.
=20
Thanks!
Chella

  _____ =20

From: Chelliah Sivachelvan (chelliah) [mailto:chelliah@cisco.com]=20
Sent: Wednesday, March 30, 2005 11:00 AM
To: 'james.yu@neustar.biz'
Cc: 'iptel@ietf.org'; 'Gonzalo.Camarillo@Ericsson.com'; =
'jon.peterson@neustar.biz'
Subject: Scope of *rn* parameter in the context of LNP


James:

The current draft (draft-ietf-iptel-tel-np-04.txt) implies that the *rn* =
parameter can contain global numbers (i.e., E.164 numbers) in the =
context of LNP. This has also been illustrated in one of the examples in =
section 6(c).=20
=20
But the scope of LNP is national; as such the scope of routing number =
(LRN) is not a globally reachable number. Therefore, it must be treated =
as a national number. RFC-3388 also makes a strong statement on this =
very subject. Here is the excerpts from RFC-3388 (section 8.2.1.1 )=20
=20
   "LRNs are necessarily national in scope, and consequently they MUST =
NOT be preceded by a '+' in the 'rn=3D' field."
=20
=20
We need to resolve the discrepancies between the two specs.
=20
 =20
Thanks!
Chella
            =20
=20
Cisco Systems,
2200 East President George Bush Turnpike ,
Richardson, TX 75082
Tel: 469.255.1169
=20


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<BODY>
<DIV><SPAN class=3D802310122-01042005><FONT face=3DArial color=3D#0000ff =

size=3D2>Chelliah,</FONT></SPAN></DIV>
<DIV><SPAN class=3D802310122-01042005><FONT face=3DArial color=3D#0000ff =

size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D802310122-01042005><FONT face=3DArial color=3D#0000ff =
size=3D2>I=20
checked RFC3398.&nbsp;&nbsp; Yes, you detected an inconsistency between =
RFC3398=20
and my I-D.</FONT></SPAN></DIV>
<DIV><SPAN class=3D802310122-01042005><FONT face=3DArial color=3D#0000ff =

size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D802310122-01042005><FONT face=3DArial color=3D#0000ff =

size=3D2>RFC3398 references&nbsp;my I-D that is not yet a =
RFC.&nbsp;&nbsp; My=20
current I-D does not use "npdi=3Dyes" (just "npdi") and the "rn" is =
either a=20
global-rn (global&nbsp;routing number)&nbsp; or local-rn (e.g., national =
number=20
with +1 in the rn-context).</FONT></SPAN></DIV>
<DIV><SPAN class=3D802310122-01042005><FONT face=3DArial color=3D#0000ff =

size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D802310122-01042005><FONT face=3DArial color=3D#0000ff =

size=3D2>RFC3398 needs to be corrected.</FONT></SPAN></DIV>
<DIV><SPAN class=3D802310122-01042005><FONT face=3DArial color=3D#0000ff =

size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D802310122-01042005><FONT face=3DArial color=3D#0000ff =

size=3D2>James</FONT></SPAN></DIV>
<BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
  <DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
  size=3D2>-----Original Message-----<BR><B>From:</B> Chelliah =
Sivachelvan=20
  (chelliah) [mailto:chelliah@cisco.com]<BR><B>Sent:</B> Wednesday, =
March 30,=20
  2005 12:05 PM<BR><B>To:</B> chelliah@cisco.com; Yu, =
James<BR><B>Cc:</B>=20
  iptel@ietf.org; Gonzalo.Camarillo@Ericsson.com; Peterson,=20
  Jon<BR><B>Subject:</B> RE: Scope of *rn* parameter in the context of=20
  LNP<BR><BR></FONT></DIV>
  <DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
  class=3D001440317-30032005>Correction: The referenced RFC is 3398 not=20
  3388.</SPAN></FONT></DIV>
  <DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
  class=3D001440317-30032005></SPAN></FONT>&nbsp;</DIV>
  <DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
  class=3D001440317-30032005>Thanks!</SPAN></FONT></DIV>
  <DIV dir=3Dltr align=3Dleft><FONT face=3DArial color=3D#0000ff =
size=3D2><SPAN=20
  class=3D001440317-30032005>Chella</SPAN></FONT></DIV><BR>
  <DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr align=3Dleft>
  <HR tabIndex=3D-1>
  <FONT face=3DTahoma size=3D2><B>From:</B> Chelliah Sivachelvan =
(chelliah)=20
  [mailto:chelliah@cisco.com] <BR><B>Sent:</B> Wednesday, March 30, 2005 =
11:00=20
  AM<BR><B>To:</B> 'james.yu@neustar.biz'<BR><B>Cc:</B> =
'iptel@ietf.org';=20
  'Gonzalo.Camarillo@Ericsson.com';=20
  'jon.peterson@neustar.biz'<BR><B>Subject:</B> Scope of *rn* parameter =
in the=20
  context of LNP<BR></FONT><BR></DIV>
  <DIV></DIV>
  <DIV><FONT face=3DArial size=3D2><SPAN=20
  class=3D138572015-30032005>James:<BR></SPAN></FONT></DIV>
  <DIV><FONT face=3DArial><SPAN class=3D138572015-30032005><FONT =
size=3D2>The current=20
  draft (<SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; =
mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; =
mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><FONT=20
  face=3DArial>draft-ietf-iptel-tel-np-04.txt) implies that the *rn*=20
  parameter&nbsp;can contain global numbers (i.e., E.164 =
numbers)&nbsp;in the=20
  context of LNP. This has also been illustrated in one of the examples =
in=20
  section 6(c).</FONT>&nbsp;</SPAN></FONT></SPAN></FONT></DIV>
  <DIV><FONT face=3DArial size=3D2><SPAN =
class=3D138572015-30032005><SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; =
mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; =
mso-fareast-language: EN-US; mso-bidi-language: =
AR-SA"></SPAN></SPAN></FONT>&nbsp;</DIV>
  <DIV><FONT face=3DArial><SPAN class=3D138572015-30032005><SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; =
mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; =
mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><FONT=20
  face=3DArial>But the&nbsp;scope of LNP is national; as such the scope =
of routing=20
  number (LRN) is not a globally reachable number.&nbsp;Therefore, it =
must be=20
  treated as a national number. RFC-3388 also makes a strong statement =
on this=20
  very subject. Here is the excerpts from RFC-3388 (section=20
  8.2.1.1&nbsp;)</FONT> </SPAN></SPAN></FONT></DIV>
  <DIV><FONT face=3DArial size=3D2><SPAN =
class=3D138572015-30032005><SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; =
mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; =
mso-fareast-language: EN-US; mso-bidi-language: =
AR-SA"></SPAN></SPAN></FONT>&nbsp;</DIV>
  <DIV><FONT face=3DArial size=3D2><SPAN =
class=3D138572015-30032005><SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; =
mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; =
mso-fareast-language: EN-US; mso-bidi-language: AR-SA">&nbsp;&nbsp;=20
  "<FONT size=3D2>LRNs are necessarily national in scope, and =
consequently they=20
  MUST NOT be preceded by a '+' in the 'rn=3D'=20
  field."</FONT></SPAN></SPAN></FONT></DIV>
  <DIV><FONT face=3DArial size=3D2><SPAN =
class=3D138572015-30032005><SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; =
mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; =
mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><FONT=20
  size=3D2></FONT></SPAN></SPAN></FONT>&nbsp;</DIV>
  <DIV><FONT face=3DArial size=3D2><SPAN =
class=3D138572015-30032005><SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; =
mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; =
mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><FONT=20
  size=3D2><FONT =
face=3DArial></FONT></FONT></SPAN></SPAN></FONT>&nbsp;</DIV>
  <DIV><FONT face=3DArial size=3D2><SPAN =
class=3D138572015-30032005><SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; =
mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; =
mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><FONT=20
  size=3D2><FONT face=3DArial>We need to resolve the discrepancies =
between the two=20
  specs.</FONT></FONT></SPAN></SPAN></FONT></DIV>
  <DIV><FONT face=3DArial size=3D2><SPAN =
class=3D138572015-30032005><SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; =
mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; =
mso-fareast-language: EN-US; mso-bidi-language: =
AR-SA"></SPAN></SPAN></FONT>&nbsp;</DIV>
  <DIV><FONT face=3DArial><SPAN class=3D138572015-30032005><SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; =
mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; =
mso-fareast-language: EN-US; mso-bidi-language: =
AR-SA">&nbsp;&nbsp;</SPAN></SPAN></FONT><FONT=20
  face=3DArial size=3D2><SPAN class=3D138572015-30032005><SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; =
mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; =
mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><FONT=20
  size=3D2><FONT face=3DArial></FONT></FONT></SPAN></SPAN></FONT></DIV>
  <DIV><FONT face=3DArial size=3D2><SPAN =
class=3D138572015-30032005><SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; =
mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; =
mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><FONT=20
  size=3D2><FONT =
face=3DArial>Thanks!</FONT></FONT></SPAN></SPAN></FONT></DIV>
  <DIV><FONT face=3DArial size=3D2><SPAN =
class=3D138572015-30032005><SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; =
mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; =
mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><FONT=20
  size=3D2><FONT face=3DArial>Chella</FONT></DIV>
  <DIV></FONT></SPAN></SPAN></FONT><FONT face=3DArial size=3D2><SPAN=20
  class=3D138572015-30032005><SPAN=20
  style=3D"FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'; =
mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; =
mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><SPAN=20
  style=3D"mso-spacerun: =
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;=20
  </SPAN></SPAN></DIV></SPAN></FONT>
  <DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
  <DIV align=3Dleft><FONT face=3DArial size=3D2>Cisco =
Systems,</FONT></DIV>
  <DIV align=3Dleft><!--StartFragment --><FONT face=3DArial =
size=3D2>2200 East=20
  President George Bush Turnpike</FONT> <FONT face=3DArial =
size=3D2>,</FONT></DIV>
  <DIV align=3Dleft><FONT face=3DArial size=3D2>Richardson, </FONT><FONT =
face=3DArial=20
  size=3D2>TX 75082</FONT></DIV>
  <DIV align=3Dleft><FONT face=3DArial><FONT size=3D2>Tel:&nbsp;<SPAN=20
  class=3D138572015-30032005>469.255.1169</SPAN></FONT></FONT></DIV>
  <DIV>&nbsp;</DIV></BLOCKQUOTE></BODY></HTML>

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It is simpler to use the presence of "npdi" to indicate "yes".=20
--------------------------
Sent from my BlackBerry Wireless Handheld


-----Original Message-----
From: Gonzalo Camarillo <Gonzalo.Camarillo@ericsson.com>
To: Yu, James <james.yu@neustar.biz>
CC: chelliah@cisco.com <chelliah@cisco.com>; iptel@ietf.org =
<iptel@ietf.org>; Peterson, Jon <jon.peterson@neustar.biz>
Sent: Sat Apr 02 01:25:35 2005
Subject: Re: Scope of *rn* parameter in the context of LNP

James,

what was the reason for moving from "npdi=3Dyes" to only "npdi"?

Thanks,

Gonzalo

Yu, James wrote:
> Chelliah,
> =20
> I checked RFC3398.   Yes, you detected an inconsistency between =
RFC3398=20
> and my I-D.
> =20
> RFC3398 references my I-D that is not yet a RFC.   My current I-D does =

> not use "npdi=3Dyes" (just "npdi") and the "rn" is either a global-rn=20
> (global routing number)  or local-rn (e.g., national number with +1 in =

> the rn-context).
> =20
> RFC3398 needs to be corrected.
> =20
> James
>=20
>     -----Original Message-----
>     *From:* Chelliah Sivachelvan (chelliah) =
[mailto:chelliah@cisco.com]
>     *Sent:* Wednesday, March 30, 2005 12:05 PM
>     *To:* chelliah@cisco.com; Yu, James
>     *Cc:* iptel@ietf.org; Gonzalo.Camarillo@Ericsson.com; Peterson, =
Jon
>     *Subject:* RE: Scope of *rn* parameter in the context of LNP
>=20
>     Correction: The referenced RFC is 3398 not 3388.
>     =20
>     Thanks!
>     Chella
>=20
>     =
------------------------------------------------------------------------
>     *From:* Chelliah Sivachelvan (chelliah) =
[mailto:chelliah@cisco.com]
>     *Sent:* Wednesday, March 30, 2005 11:00 AM
>     *To:* 'james.yu@neustar.biz'
>     *Cc:* 'iptel@ietf.org'; 'Gonzalo.Camarillo@Ericsson.com';
>     'jon.peterson@neustar.biz'
>     *Subject:* Scope of *rn* parameter in the context of LNP
>=20
>     James:
>     The current draft (draft-ietf-iptel-tel-np-04.txt) implies that =
the
>     *rn* parameter can contain global numbers (i.e., E.164 numbers) in
>     the context of LNP. This has also been illustrated in one of the
>     examples in section 6(c).=20
>     =20
>     But the scope of LNP is national; as such the scope of routing
>     number (LRN) is not a globally reachable number. Therefore, it =
must
>     be treated as a national number. RFC-3388 also makes a strong
>     statement on this very subject. Here is the excerpts from RFC-3388
>     (section 8.2.1.1 )
>     =20
>        "LRNs are necessarily national in scope, and consequently they
>     MUST NOT be preceded by a '+' in the 'rn=3D' field."
>     =20
>     =20
>     We need to resolve the discrepancies between the two specs.
>     =20
>      =20
>     Thanks!
>     Chella
>                =20
>     =20
>     Cisco Systems,
>     2200 East President George Bush Turnpike ,
>     Richardson, TX 75082
>     Tel: 469.255.1169
>     =20

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
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<TITLE>Re: Scope of *rn* parameter in the context of LNP</TITLE>
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<P><FONT SIZE=3D2>It is simpler to use the presence of =
&#8220;npdi&#8221; to indicate &#8220;yes&#8221;.<BR>
--------------------------<BR>
Sent from my BlackBerry Wireless Handheld<BR>
<BR>
<BR>
-----Original Message-----<BR>
From: Gonzalo Camarillo &lt;Gonzalo.Camarillo@ericsson.com&gt;<BR>
To: Yu, James &lt;james.yu@neustar.biz&gt;<BR>
CC: chelliah@cisco.com &lt;chelliah@cisco.com&gt;; iptel@ietf.org =
&lt;iptel@ietf.org&gt;; Peterson, Jon =
&lt;jon.peterson@neustar.biz&gt;<BR>
Sent: Sat Apr 02 01:25:35 2005<BR>
Subject: Re: Scope of *rn* parameter in the context of LNP<BR>
<BR>
James,<BR>
<BR>
what was the reason for moving from &quot;npdi=3Dyes&quot; to only =
&quot;npdi&quot;?<BR>
<BR>
Thanks,<BR>
<BR>
Gonzalo<BR>
<BR>
Yu, James wrote:<BR>
&gt; Chelliah,<BR>
&gt;&nbsp;<BR>
&gt; I checked RFC3398.&nbsp;&nbsp; Yes, you detected an inconsistency =
between RFC3398<BR>
&gt; and my I-D.<BR>
&gt;&nbsp;<BR>
&gt; RFC3398 references my I-D that is not yet a RFC.&nbsp;&nbsp; My =
current I-D does<BR>
&gt; not use &quot;npdi=3Dyes&quot; (just &quot;npdi&quot;) and the =
&quot;rn&quot; is either a global-rn<BR>
&gt; (global routing number)&nbsp; or local-rn (e.g., national number =
with +1 in<BR>
&gt; the rn-context).<BR>
&gt;&nbsp;<BR>
&gt; RFC3398 needs to be corrected.<BR>
&gt;&nbsp;<BR>
&gt; James<BR>
&gt;<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; -----Original Message-----<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; *From:* Chelliah Sivachelvan (chelliah) [<A =
HREF=3D"mailto:chelliah@cisco.com">mailto:chelliah@cisco.com</A>]<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; *Sent:* Wednesday, March 30, 2005 12:05 =
PM<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; *To:* chelliah@cisco.com; Yu, James<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; *Cc:* iptel@ietf.org; =
Gonzalo.Camarillo@Ericsson.com; Peterson, Jon<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; *Subject:* RE: Scope of *rn* parameter in =
the context of LNP<BR>
&gt;<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; Correction: The referenced RFC is 3398 not =
3388.<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; Thanks!<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; Chella<BR>
&gt;<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; =
------------------------------------------------------------------------<=
BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; *From:* Chelliah Sivachelvan (chelliah) [<A =
HREF=3D"mailto:chelliah@cisco.com">mailto:chelliah@cisco.com</A>]<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; *Sent:* Wednesday, March 30, 2005 11:00 =
AM<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; *To:* 'james.yu@neustar.biz'<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; *Cc:* 'iptel@ietf.org'; =
'Gonzalo.Camarillo@Ericsson.com';<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; 'jon.peterson@neustar.biz'<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; *Subject:* Scope of *rn* parameter in the =
context of LNP<BR>
&gt;<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; James:<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; The current draft =
(draft-ietf-iptel-tel-np-04.txt) implies that the<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; *rn* parameter can contain global numbers =
(i.e., E.164 numbers) in<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; the context of LNP. This has also been =
illustrated in one of the<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; examples in section 6(c).<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; But the scope of LNP is national; as such =
the scope of routing<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; number (LRN) is not a globally reachable =
number. Therefore, it must<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; be treated as a national number. RFC-3388 =
also makes a strong<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; statement on this very subject. Here is the =
excerpts from RFC-3388<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; (section 8.2.1.1 )<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &quot;LRNs are =
necessarily national in scope, and consequently they<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; MUST NOT be preceded by a '+' in the =
'rn=3D' field.&quot;<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; We need to resolve the discrepancies =
between the two specs.<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; Thanks!<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; Chella<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; Cisco Systems,<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; 2200 East President George Bush Turnpike =
,<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; Richardson, TX 75082<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp; Tel: 469.255.1169<BR>
&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>
</FONT>
</P>

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Cc: iptel@ietf.org, "Peterson, Jon" <jon.peterson@neustar.biz>,
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Subject: [Iptel] Re: Scope of *rn* parameter in the context of LNP
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James,

what was the reason for moving from "npdi=yes" to only "npdi"?

Thanks,

Gonzalo

Yu, James wrote:
> Chelliah,
>  
> I checked RFC3398.   Yes, you detected an inconsistency between RFC3398 
> and my I-D.
>  
> RFC3398 references my I-D that is not yet a RFC.   My current I-D does 
> not use "npdi=yes" (just "npdi") and the "rn" is either a global-rn 
> (global routing number)  or local-rn (e.g., national number with +1 in 
> the rn-context).
>  
> RFC3398 needs to be corrected.
>  
> James
> 
>     -----Original Message-----
>     *From:* Chelliah Sivachelvan (chelliah) [mailto:chelliah@cisco.com]
>     *Sent:* Wednesday, March 30, 2005 12:05 PM
>     *To:* chelliah@cisco.com; Yu, James
>     *Cc:* iptel@ietf.org; Gonzalo.Camarillo@Ericsson.com; Peterson, Jon
>     *Subject:* RE: Scope of *rn* parameter in the context of LNP
> 
>     Correction: The referenced RFC is 3398 not 3388.
>      
>     Thanks!
>     Chella
> 
>     ------------------------------------------------------------------------
>     *From:* Chelliah Sivachelvan (chelliah) [mailto:chelliah@cisco.com]
>     *Sent:* Wednesday, March 30, 2005 11:00 AM
>     *To:* 'james.yu@neustar.biz'
>     *Cc:* 'iptel@ietf.org'; 'Gonzalo.Camarillo@Ericsson.com';
>     'jon.peterson@neustar.biz'
>     *Subject:* Scope of *rn* parameter in the context of LNP
> 
>     James:
>     The current draft (draft-ietf-iptel-tel-np-04.txt) implies that the
>     *rn* parameter can contain global numbers (i.e., E.164 numbers) in
>     the context of LNP. This has also been illustrated in one of the
>     examples in section 6(c). 
>      
>     But the scope of LNP is national; as such the scope of routing
>     number (LRN) is not a globally reachable number. Therefore, it must
>     be treated as a national number. RFC-3388 also makes a strong
>     statement on this very subject. Here is the excerpts from RFC-3388
>     (section 8.2.1.1 )
>      
>        "LRNs are necessarily national in scope, and consequently they
>     MUST NOT be preceded by a '+' in the 'rn=' field."
>      
>      
>     We need to resolve the discrepancies between the two specs.
>      
>       
>     Thanks!
>     Chella
>                 
>      
>     Cisco Systems,
>     2200 East President George Bush Turnpike ,
>     Richardson, TX 75082
>     Tel: 469.255.1169
>      

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Cc: iptel@ietf.org, "Peterson, Jon" <jon.peterson@neustar.biz>,
        chelliah@cisco.com
Subject: [Iptel] Re: Scope of *rn* parameter in the context of LNP
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If that is the only reason for the change and the change causes a=20
backward compatibility issue with RFC 3398, I would say that we keep the=20
npdi=3Dyes syntax.

Gonzalo

Yu, James wrote:
> It is simpler to use the presence of =93npdi=94 to indicate =93yes=94.
> --------------------------
> Sent from my BlackBerry Wireless Handheld
>=20
>=20
> -----Original Message-----
> From: Gonzalo Camarillo <Gonzalo.Camarillo@ericsson.com>
> To: Yu, James <james.yu@neustar.biz>
> CC: chelliah@cisco.com <chelliah@cisco.com>; iptel@ietf.org=20
> <iptel@ietf.org>; Peterson, Jon <jon.peterson@neustar.biz>
> Sent: Sat Apr 02 01:25:35 2005
> Subject: Re: Scope of *rn* parameter in the context of LNP
>=20
> James,
>=20
> what was the reason for moving from "npdi=3Dyes" to only "npdi"?
>=20
> Thanks,
>=20
> Gonzalo
>=20
> Yu, James wrote:
>  > Chelliah,
>  >=20
>  > I checked RFC3398.   Yes, you detected an inconsistency between RFC3=
398
>  > and my I-D.
>  >=20
>  > RFC3398 references my I-D that is not yet a RFC.   My current I-D do=
es
>  > not use "npdi=3Dyes" (just "npdi") and the "rn" is either a global-r=
n
>  > (global routing number)  or local-rn (e.g., national number with +1 =
in
>  > the rn-context).
>  >=20
>  > RFC3398 needs to be corrected.
>  >=20
>  > James
>  >
>  >     -----Original Message-----
>  >     *From:* Chelliah Sivachelvan (chelliah) [mailto:chelliah@cisco.c=
om]
>  >     *Sent:* Wednesday, March 30, 2005 12:05 PM
>  >     *To:* chelliah@cisco.com; Yu, James
>  >     *Cc:* iptel@ietf.org; Gonzalo.Camarillo@Ericsson.com; Peterson, =
Jon
>  >     *Subject:* RE: Scope of *rn* parameter in the context of LNP
>  >
>  >     Correction: The referenced RFC is 3398 not 3388.
>  >    =20
>  >     Thanks!
>  >     Chella
>  >
>  >    =20
> -----------------------------------------------------------------------=
-
>  >     *From:* Chelliah Sivachelvan (chelliah) [mailto:chelliah@cisco.c=
om]
>  >     *Sent:* Wednesday, March 30, 2005 11:00 AM
>  >     *To:* 'james.yu@neustar.biz'
>  >     *Cc:* 'iptel@ietf.org'; 'Gonzalo.Camarillo@Ericsson.com';
>  >     'jon.peterson@neustar.biz'
>  >     *Subject:* Scope of *rn* parameter in the context of LNP
>  >
>  >     James:
>  >     The current draft (draft-ietf-iptel-tel-np-04.txt) implies that =
the
>  >     *rn* parameter can contain global numbers (i.e., E.164 numbers) =
in
>  >     the context of LNP. This has also been illustrated in one of the
>  >     examples in section 6(c).
>  >    =20
>  >     But the scope of LNP is national; as such the scope of routing
>  >     number (LRN) is not a globally reachable number. Therefore, it m=
ust
>  >     be treated as a national number. RFC-3388 also makes a strong
>  >     statement on this very subject. Here is the excerpts from RFC-33=
88
>  >     (section 8.2.1.1 )
>  >    =20
>  >        "LRNs are necessarily national in scope, and consequently the=
y
>  >     MUST NOT be preceded by a '+' in the 'rn=3D' field."
>  >    =20
>  >    =20
>  >     We need to resolve the discrepancies between the two specs.
>  >    =20
>  >     =20
>  >     Thanks!
>  >     Chella
>  >               =20
>  >    =20
>  >     Cisco Systems,
>  >     2200 East President George Bush Turnpike ,
>  >     Richardson, TX 75082
>  >     Tel: 469.255.1169
>  >    =20
>=20

--=20
Gonzalo Camarillo         Phone :  +358  9 299 33 71
Oy L M Ericsson Ab        Mobile:  +358 40 702 35 35
Telecom R&D               Fax   :  +358  9 299 30 52
FIN-02420 Jorvas          Email :  Gonzalo.Camarillo@ericsson.com
Finland                   http://www.hut.fi/~gonzalo

_______________________________________________
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From iptel-bounces@ietf.org  Fri Apr  8 13:38:34 2005
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From: "Chaidez, Fidencio (Fidencio)" <fchaidez@lucent.com>
To: "'Gonzalo Camarillo'" <Gonzalo.Camarillo@ericsson.com>,
        "Yu, James"
	<james.yu@neustar.biz>
Subject: RE: [Iptel] Re: Scope of *rn* parameter in the context of LNP
Date: Fri, 8 Apr 2005 12:37:30 -0500 
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James, Gonzalo:
You should proceed carefully.  The npdi (without the "=3Dyes")
syntax has been around in drafts for quite a while and, I'm sure,
has been widely implemented.  T1.679 (the U.S. equivalent
of Q.1912.5), like RFC 3398, made the mistake of referencing
this parameter even though it had not reached RFC status yet,
but it did so based on more recent drafts that showed the
npdi parameter by itself.  Should allow for more discussion.
Regards,
Fidencio

-----Original Message-----
From: Gonzalo Camarillo [mailto:Gonzalo.Camarillo@ericsson.com]
Sent: Friday, April 08, 2005 7:09 AM
To: Yu, James
Cc: iptel@ietf.org; Peterson, Jon; chelliah@cisco.com
Subject: [Iptel] Re: Scope of *rn* parameter in the context of LNP


If that is the only reason for the change and the change causes a=20
backward compatibility issue with RFC 3398, I would say that we keep =
the=20
npdi=3Dyes syntax.

Gonzalo

Yu, James wrote:
> It is simpler to use the presence of =93npdi=94 to indicate =
=93yes=94.
> --------------------------
> Sent from my BlackBerry Wireless Handheld
>=20
>=20
> -----Original Message-----
> From: Gonzalo Camarillo <Gonzalo.Camarillo@ericsson.com>
> To: Yu, James <james.yu@neustar.biz>
> CC: chelliah@cisco.com <chelliah@cisco.com>; iptel@ietf.org=20
> <iptel@ietf.org>; Peterson, Jon <jon.peterson@neustar.biz>
> Sent: Sat Apr 02 01:25:35 2005
> Subject: Re: Scope of *rn* parameter in the context of LNP
>=20
> James,
>=20
> what was the reason for moving from "npdi=3Dyes" to only "npdi"?
>=20
> Thanks,
>=20
> Gonzalo
>=20
> Yu, James wrote:
>  > Chelliah,
>  >=20
>  > I checked RFC3398.   Yes, you detected an inconsistency between =
RFC3398
>  > and my I-D.
>  >=20
>  > RFC3398 references my I-D that is not yet a RFC.   My current I-D =
does
>  > not use "npdi=3Dyes" (just "npdi") and the "rn" is either a =
global-rn
>  > (global routing number)  or local-rn (e.g., national number with =
+1 in
>  > the rn-context).
>  >=20
>  > RFC3398 needs to be corrected.
>  >=20
>  > James
>  >
>  >     -----Original Message-----
>  >     *From:* Chelliah Sivachelvan (chelliah) =
[mailto:chelliah@cisco.com]
>  >     *Sent:* Wednesday, March 30, 2005 12:05 PM
>  >     *To:* chelliah@cisco.com; Yu, James
>  >     *Cc:* iptel@ietf.org; Gonzalo.Camarillo@Ericsson.com; =
Peterson, Jon
>  >     *Subject:* RE: Scope of *rn* parameter in the context of LNP
>  >
>  >     Correction: The referenced RFC is 3398 not 3388.
>  >    =20
>  >     Thanks!
>  >     Chella
>  >
>  >    =20
> =
------------------------------------------------------------------------=

>  >     *From:* Chelliah Sivachelvan (chelliah) =
[mailto:chelliah@cisco.com]
>  >     *Sent:* Wednesday, March 30, 2005 11:00 AM
>  >     *To:* 'james.yu@neustar.biz'
>  >     *Cc:* 'iptel@ietf.org'; 'Gonzalo.Camarillo@Ericsson.com';
>  >     'jon.peterson@neustar.biz'
>  >     *Subject:* Scope of *rn* parameter in the context of LNP
>  >
>  >     James:
>  >     The current draft (draft-ietf-iptel-tel-np-04.txt) implies =
that the
>  >     *rn* parameter can contain global numbers (i.e., E.164 =
numbers) in
>  >     the context of LNP. This has also been illustrated in one of =
the
>  >     examples in section 6(c).
>  >    =20
>  >     But the scope of LNP is national; as such the scope of routing
>  >     number (LRN) is not a globally reachable number. Therefore, it =
must
>  >     be treated as a national number. RFC-3388 also makes a strong
>  >     statement on this very subject. Here is the excerpts from =
RFC-3388
>  >     (section 8.2.1.1 )
>  >    =20
>  >        "LRNs are necessarily national in scope, and consequently =
they
>  >     MUST NOT be preceded by a '+' in the 'rn=3D' field."
>  >    =20
>  >    =20
>  >     We need to resolve the discrepancies between the two specs.
>  >    =20
>  >     =20
>  >     Thanks!
>  >     Chella
>  >               =20
>  >    =20
>  >     Cisco Systems,
>  >     2200 East President George Bush Turnpike ,
>  >     Richardson, TX 75082
>  >     Tel: 469.255.1169
>  >    =20
>=20

--=20
Gonzalo Camarillo         Phone :  +358  9 299 33 71
Oy L M Ericsson Ab        Mobile:  +358 40 702 35 35
Telecom R&D               Fax   :  +358  9 299 30 52
FIN-02420 Jorvas          Email :  Gonzalo.Camarillo@ericsson.com
Finland                   http://www.hut.fi/~gonzalo

_______________________________________________
Iptel mailing list
Iptel@ietf.org
https://www1.ietf.org/mailman/listinfo/iptel

_______________________________________________
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https://www1.ietf.org/mailman/listinfo/iptel


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Subject: RE: [Iptel] Re: Scope of *rn* parameter in the context of LNP
Date: Wed, 13 Apr 2005 04:28:12 -0400
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Thread-Topic: [Iptel] Re: Scope of *rn* parameter in the context of LNP
Thread-Index: AcU8YbDaNexD2bBGRACJGgLo0Qac9ADoIPdQ
From: "Yu, James" <james.yu@neustar.biz>
To: "Chaidez, Fidencio \(Fidencio\)" <fchaidez@lucent.com>,
        "Gonzalo Camarillo" <Gonzalo.Camarillo@ericsson.com>
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I suggest that we don't change anything in the current NP I-D.   This is =
because RFC3398 needs to correct the "rn" part and there are =
implementations/standards that follow the latest version of the NP I-D.

James

-----Original Message-----
From: Chaidez, Fidencio (Fidencio) [mailto:fchaidez@lucent.com]
Sent: Friday, April 08, 2005 1:38 PM
To: 'Gonzalo Camarillo'; Yu, James
Cc: iptel@ietf.org; Peterson, Jon; chelliah@cisco.com
Subject: RE: [Iptel] Re: Scope of *rn* parameter in the context of LNP


James, Gonzalo:
You should proceed carefully.  The npdi (without the "=3Dyes")
syntax has been around in drafts for quite a while and, I'm sure,
has been widely implemented.  T1.679 (the U.S. equivalent
of Q.1912.5), like RFC 3398, made the mistake of referencing
this parameter even though it had not reached RFC status yet,
but it did so based on more recent drafts that showed the
npdi parameter by itself.  Should allow for more discussion.
Regards,
Fidencio

-----Original Message-----
From: Gonzalo Camarillo [mailto:Gonzalo.Camarillo@ericsson.com]
Sent: Friday, April 08, 2005 7:09 AM
To: Yu, James
Cc: iptel@ietf.org; Peterson, Jon; chelliah@cisco.com
Subject: [Iptel] Re: Scope of *rn* parameter in the context of LNP


If that is the only reason for the change and the change causes a=20
backward compatibility issue with RFC 3398, I would say that we keep the =

npdi=3Dyes syntax.

Gonzalo

Yu, James wrote:
> It is simpler to use the presence of "npdi" to indicate "yes".
> --------------------------
> Sent from my BlackBerry Wireless Handheld
>=20
>=20
> -----Original Message-----
> From: Gonzalo Camarillo <Gonzalo.Camarillo@ericsson.com>
> To: Yu, James <james.yu@neustar.biz>
> CC: chelliah@cisco.com <chelliah@cisco.com>; iptel@ietf.org=20
> <iptel@ietf.org>; Peterson, Jon <jon.peterson@neustar.biz>
> Sent: Sat Apr 02 01:25:35 2005
> Subject: Re: Scope of *rn* parameter in the context of LNP
>=20
> James,
>=20
> what was the reason for moving from "npdi=3Dyes" to only "npdi"?
>=20
> Thanks,
>=20
> Gonzalo
>=20
> Yu, James wrote:
>  > Chelliah,
>  >=20
>  > I checked RFC3398.   Yes, you detected an inconsistency between =
RFC3398
>  > and my I-D.
>  >=20
>  > RFC3398 references my I-D that is not yet a RFC.   My current I-D =
does
>  > not use "npdi=3Dyes" (just "npdi") and the "rn" is either a =
global-rn
>  > (global routing number)  or local-rn (e.g., national number with +1 =
in
>  > the rn-context).
>  >=20
>  > RFC3398 needs to be corrected.
>  >=20
>  > James
>  >
>  >     -----Original Message-----
>  >     *From:* Chelliah Sivachelvan (chelliah) =
[mailto:chelliah@cisco.com]
>  >     *Sent:* Wednesday, March 30, 2005 12:05 PM
>  >     *To:* chelliah@cisco.com; Yu, James
>  >     *Cc:* iptel@ietf.org; Gonzalo.Camarillo@Ericsson.com; Peterson, =
Jon
>  >     *Subject:* RE: Scope of *rn* parameter in the context of LNP
>  >
>  >     Correction: The referenced RFC is 3398 not 3388.
>  >    =20
>  >     Thanks!
>  >     Chella
>  >
>  >    =20
> =
------------------------------------------------------------------------
>  >     *From:* Chelliah Sivachelvan (chelliah) =
[mailto:chelliah@cisco.com]
>  >     *Sent:* Wednesday, March 30, 2005 11:00 AM
>  >     *To:* 'james.yu@neustar.biz'
>  >     *Cc:* 'iptel@ietf.org'; 'Gonzalo.Camarillo@Ericsson.com';
>  >     'jon.peterson@neustar.biz'
>  >     *Subject:* Scope of *rn* parameter in the context of LNP
>  >
>  >     James:
>  >     The current draft (draft-ietf-iptel-tel-np-04.txt) implies that =
the
>  >     *rn* parameter can contain global numbers (i.e., E.164 numbers) =
in
>  >     the context of LNP. This has also been illustrated in one of =
the
>  >     examples in section 6(c).
>  >    =20
>  >     But the scope of LNP is national; as such the scope of routing
>  >     number (LRN) is not a globally reachable number. Therefore, it =
must
>  >     be treated as a national number. RFC-3388 also makes a strong
>  >     statement on this very subject. Here is the excerpts from =
RFC-3388
>  >     (section 8.2.1.1 )
>  >    =20
>  >        "LRNs are necessarily national in scope, and consequently =
they
>  >     MUST NOT be preceded by a '+' in the 'rn=3D' field."
>  >    =20
>  >    =20
>  >     We need to resolve the discrepancies between the two specs.
>  >    =20
>  >     =20
>  >     Thanks!
>  >     Chella
>  >               =20
>  >    =20
>  >     Cisco Systems,
>  >     2200 East President George Bush Turnpike ,
>  >     Richardson, TX 75082
>  >     Tel: 469.255.1169
>  >    =20
>=20

--=20
Gonzalo Camarillo         Phone :  +358  9 299 33 71
Oy L M Ericsson Ab        Mobile:  +358 40 702 35 35
Telecom R&D               Fax   :  +358  9 299 30 52
FIN-02420 Jorvas          Email :  Gonzalo.Camarillo@ericsson.com
Finland                   http://www.hut.fi/~gonzalo

_______________________________________________
Iptel mailing list
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https://www1.ietf.org/mailman/listinfo/iptel

_______________________________________________
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Subject: [Iptel] I-D ACTION:draft-ietf-iptel-tel-enumdi-01.txt
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--NextPart

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the IP Telephony Working Group of the IETF.

	Title		: The ENUM Dip Indicator parameter for the "tel" URI
	Author(s)	: R. Stastny, et al.
	Filename	: draft-ietf-iptel-tel-enumdi-01.txt
	Pages		: 12
	Date		: 2005-4-18
	
This document defines a new parameter "enumdi" in the "tel" Uniform
   Resource Identifier (URI) as defined in RFC3966 to support the
   handling of ENUM queries in SIP proxies, H.323 gatekeepers and other
   VoIP network elements.  The presence of the "enumdi" parameter
   indicates to the VoIP network element receiving an URI containing an       
   E.164 number that an ENUM query as defined in RFC3761 has already
   been performed on the E.164 number indicated by the previous VoIP
   network element.

A URL for this Internet-Draft is:
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From iptel-bounces@ietf.org Mon Apr 18 18:44:04 2005
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Date: Mon, 18 Apr 2005 17:43:40 -0500
From: "Vijay K. Gurbani" <vkg@lucent.com>
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Subject: [Iptel] Finishing work on trunk-group
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Folks:

I will really like to finish the remaing work on trunk-group.
The I-D has been WGLC'd, and the current version (-03) is
the version that includes comments raised and addressed
during WGLC.

Shortly after I posted -03, Paul K. pointed out a small
discrepancy that is worth addressing (his email, which has
mysteriously disappeared from the archives, is reproduced
in its entirety at the end of this mail).  I will like to
resolve this point and move the I-D forward.

Paul notes that the "phone-context" parameter may not be
applicable to a global tel URI (i.e., +1...) -- it may be
valid syntactically, but it is not the intent of rfc3966 that
it appear as such (and we all know that in ABNF, what may be
syntactically correct may not be semantically so).

So, there are two ways around this:

1) Change the examples in the I-D to use local numbers, and not
    global numbers;
2) Have the I-D suggest an alternate means to approximate the
    reason we have used the "phone-context" parameter.  That is,
    replace "phone-context" parameter with another parameter (see
    below for more on this).

(1) is sweeping the problem under the rug; as such, I don't think
we should go that route.  That leaves us with (2).

The reason we are using the "phone-context" parameter is to
impose a namespace on the trunk group (the way the I-D defines it,
a trunk group MUST have a "phone-context"), BUT, a "phone-context"
cannot appear in a global tel URI.  So, we simply define a
new parameter -- call it "trunk-context" -- that has the same
semantics as a "phone-context".  This new parameter will be
defined by the trunk-group I-D as such:

  par = parameter / extension / isdn-subaddress / trunk-group

  trunk-group = ";tgrp=" trunk-group-label ";trunk-context="
                trunk-context
  trunk-group-label = *1( unreserved / escaped /
                          trunk-group-unreserved )
  trunk-group-unreserved = "/" / "&" / "+" / "$"
  trunk-context = descriptor
  descriptor = domainname / global-number-digits

The new parameter replaces "phone-context", but provides the
same semantics of imposing a namespace.

I will like the WG to comment on this, or suggest alternative
means.  I think that this is a small enough change that
assuming the WG agrees to it, I can rev the I-D and request the
WG chairs to forward the I-D to IESG.

Please send me your comments and/or concerns.  Unless I hear
otherwise, I will make the requisite change and, hopefully,
finsish the pending work on trunk-group.

Thank you.

Begin Paul's original email ------

Subject: [Iptel] Re: draft-ietf-iptel-trunk-group-03
From: Paul Kyzivat <pkyzivat@cisco.com>
Date: Wed, 16 Feb 2005 19:26:05 -0500
To: "Vijay K. Gurbani" <vkg@lucent.com>, fluffy@cisco.com
CC: iptel <iptel@ietf.org>

One thing concerns me in this draft:

You are requiring use of the phone-context parameter, even with global 
numbers, such as:

     tel:+15555551212;phone-context=telco.example.com;tgrp=tg55

Now this may be debatable, but I believe that usage is currently invalid 
according to RFC3966. (Phone-context is only valid with a local-number.) 
Here is some of the ABNF from 3966:

    telephone-uri        = "tel:" telephone-subscriber
    telephone-subscriber = global-number / local-number
    global-number        = global-number-digits *par
    local-number         = local-number-digits *par context *par

    context              = ";phone-context=" descriptor

    par                  = parameter / extension / isdn-subaddress
    extension            = ";ext=" 1*phonedigit
    isdn-subaddress      = ";isub=" 1*uric

    parameter            = ";" pname ["=" pvalue ]
    pname                = 1*( alphanum / "-" )

Its arguable because "phone-context" can be parsed as both a 'context' 
and a 'parameter'. But I think it is pretty clear that isn't the intent. 
(And if it was, then semantically it would just be a parameer, not a 
context.)

So I think you need to make a *change* rather than just an *extension* 
to 3966 if you want to use phone-context with global numbers.

     Paul

End Paul's original email ------

Thanks,

- vijay
-- 
Vijay K. Gurbani  vkg@{lucent.com,research.bell-labs.com,acm.org}
Wireless Networks Group/Internet Software and Services
Lucent Technologies/Bell Labs Innovations, 2000 Lucent Lane, Rm 6G-440
Naperville, Illinois 60566     Voice: +1 630 224 0216

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From iptel-bounces@ietf.org Mon Apr 18 19:06:42 2005
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Vijay,

I only have one point, and I think it is just a matter of my needing a 
clarification of your intent.

How do you imagine these parameters end up in a URI? I can only think of 
two ways:

- a request is coming in from a gateway. It knows the trunk group and so 
can form the URI as a contact address, or whatever.

- a request is going out toward a gateway. Initially the address is 
known as a phone number. Some server manages the gateway and is aware of 
the resources it contains and how they are named. It rewrites the R-URI, 
inserting tg and tg-context parameters.

I'm thinking about the latter case, if it is even in scope.

Then I am also thinking about the possiblity that the telephone number 
that is heading toward the gateway is a local rather than global number. 
 From your syntax, I presume you believe that to be ok.

For it to begin life as a local number, before having the tg added, it 
must have had a phone context. E.g. something like:

	tel:411;phone-context=+1

Now, when the proxy decides to insert the tg and tg-context, does the 
phone-context remain, or is it removed and *replaced* by the tg-context? 
Any clue what the relationship between the contexts might be?

E.g. which of the following does the above become?

	tel:411;tg=3;tg-context=+1
	tel:411;phone-context=+1;tg=3;tg-context=+1
	tel:411;phone-context=+1;tg=3;tg-context=something.else

I don't much care, as long as it works and makes sense. Maybe an example 
or two showing how this should work would help.

	Paul

Vijay K. Gurbani wrote:
> Folks:
> 
> I will really like to finish the remaing work on trunk-group.
> The I-D has been WGLC'd, and the current version (-03) is
> the version that includes comments raised and addressed
> during WGLC.
> 
> Shortly after I posted -03, Paul K. pointed out a small
> discrepancy that is worth addressing (his email, which has
> mysteriously disappeared from the archives, is reproduced
> in its entirety at the end of this mail).  I will like to
> resolve this point and move the I-D forward.
> 
> Paul notes that the "phone-context" parameter may not be
> applicable to a global tel URI (i.e., +1...) -- it may be
> valid syntactically, but it is not the intent of rfc3966 that
> it appear as such (and we all know that in ABNF, what may be
> syntactically correct may not be semantically so).
> 
> So, there are two ways around this:
> 
> 1) Change the examples in the I-D to use local numbers, and not
>    global numbers;
> 2) Have the I-D suggest an alternate means to approximate the
>    reason we have used the "phone-context" parameter.  That is,
>    replace "phone-context" parameter with another parameter (see
>    below for more on this).
> 
> (1) is sweeping the problem under the rug; as such, I don't think
> we should go that route.  That leaves us with (2).
> 
> The reason we are using the "phone-context" parameter is to
> impose a namespace on the trunk group (the way the I-D defines it,
> a trunk group MUST have a "phone-context"), BUT, a "phone-context"
> cannot appear in a global tel URI.  So, we simply define a
> new parameter -- call it "trunk-context" -- that has the same
> semantics as a "phone-context".  This new parameter will be
> defined by the trunk-group I-D as such:
> 
>  par = parameter / extension / isdn-subaddress / trunk-group
> 
>  trunk-group = ";tgrp=" trunk-group-label ";trunk-context="
>                trunk-context
>  trunk-group-label = *1( unreserved / escaped /
>                          trunk-group-unreserved )
>  trunk-group-unreserved = "/" / "&" / "+" / "$"
>  trunk-context = descriptor
>  descriptor = domainname / global-number-digits
> 
> The new parameter replaces "phone-context", but provides the
> same semantics of imposing a namespace.
> 
> I will like the WG to comment on this, or suggest alternative
> means.  I think that this is a small enough change that
> assuming the WG agrees to it, I can rev the I-D and request the
> WG chairs to forward the I-D to IESG.
> 
> Please send me your comments and/or concerns.  Unless I hear
> otherwise, I will make the requisite change and, hopefully,
> finsish the pending work on trunk-group.
> 
> Thank you.
> 
> Begin Paul's original email ------
> 
> Subject: [Iptel] Re: draft-ietf-iptel-trunk-group-03
> From: Paul Kyzivat <pkyzivat@cisco.com>
> Date: Wed, 16 Feb 2005 19:26:05 -0500
> To: "Vijay K. Gurbani" <vkg@lucent.com>, fluffy@cisco.com
> CC: iptel <iptel@ietf.org>
> 
> One thing concerns me in this draft:
> 
> You are requiring use of the phone-context parameter, even with global 
> numbers, such as:
> 
>     tel:+15555551212;phone-context=telco.example.com;tgrp=tg55
> 
> Now this may be debatable, but I believe that usage is currently invalid 
> according to RFC3966. (Phone-context is only valid with a local-number.) 
> Here is some of the ABNF from 3966:
> 
>    telephone-uri        = "tel:" telephone-subscriber
>    telephone-subscriber = global-number / local-number
>    global-number        = global-number-digits *par
>    local-number         = local-number-digits *par context *par
> 
>    context              = ";phone-context=" descriptor
> 
>    par                  = parameter / extension / isdn-subaddress
>    extension            = ";ext=" 1*phonedigit
>    isdn-subaddress      = ";isub=" 1*uric
> 
>    parameter            = ";" pname ["=" pvalue ]
>    pname                = 1*( alphanum / "-" )
> 
> Its arguable because "phone-context" can be parsed as both a 'context' 
> and a 'parameter'. But I think it is pretty clear that isn't the intent. 
> (And if it was, then semantically it would just be a parameer, not a 
> context.)
> 
> So I think you need to make a *change* rather than just an *extension* 
> to 3966 if you want to use phone-context with global numbers.
> 
>     Paul
> 
> End Paul's original email ------
> 
> Thanks,
> 
> - vijay

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Paul Kyzivat wrote:
> How do you imagine these parameters end up in a URI? I can only think of 
> two ways:
> 
> - a request is coming in from a gateway. It knows the trunk group and so 
> can form the URI as a contact address, or whatever.
> 
> - a request is going out toward a gateway. Initially the address is 
> known as a phone number. Some server manages the gateway and is aware of 
> the resources it contains and how they are named. It rewrites the R-URI, 
> inserting tg and tg-context parameters.
> 
> I'm thinking about the latter case, if it is even in scope.

Paul:

The latter case is actually what caused us to look into this
in the first place.

> Now, when the proxy decides to insert the tg and tg-context, does the 
> phone-context remain, or is it removed and *replaced* by the tg-context? 
> Any clue what the relationship between the contexts might be?
[...]

OK; I see your point.  If it is a local number, it will have a phone-
context added.  This means that the trunk-context cannot replace
phone-context, it acts as another qualifier.

> I don't much care, as long as it works and makes sense. Maybe an example 
> or two showing how this should work would help.

Sure; in the next rev, I will spell out the interaction between
these with an example or so.

Thanks,

- vijay
-- 
Vijay K. Gurbani  vkg@{lucent.com,research.bell-labs.com,acm.org}
Wireless Networks Group/Internet Software and Services
Lucent Technologies/Bell Labs Innovations, 2000 Lucent Lane, Rm 6G-440
Naperville, Illinois 60566     Voice: +1 630 224 0216

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From: "Shan Lu" <shanlu@sentito.com>
To: "'Vijay K. Gurbani'" <vkg@lucent.com>
Subject: RE: [Iptel] Re: Finishing work on trunk-group
Date: Mon, 25 Apr 2005 15:40:29 -0400
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>-----Original Message-----
>From: iptel-bounces@ietf.org [mailto:iptel-bounces@ietf.org] 
>On Behalf Of Vijay K. Gurbani
>Sent: Tuesday, April 19, 2005 10:49 AM
>To: Paul Kyzivat
>Cc: IETF IPTEL WG
>Subject: Re: [Iptel] Re: Finishing work on trunk-group
>
>
<snip>
>
>OK; I see your point.  If it is a local number, it will have a phone-
>context added.  This means that the trunk-context cannot replace
>phone-context, it acts as another qualifier.
>
>> I don't much care, as long as it works and makes sense. 
>Maybe an example 
>> or two showing how this should work would help.

Vijay,

I support adding "trunk-context". But I would prefer to allow 
"tel:411;phone-context=foo.com;tgrp=abc123" as a valid format. If
"trunk-context" is present, it defines context for the trunk group. If not,
"phone-context" serves that purpose. 

Often times, tel uri is carried in sip uri. The userinfo portion already
looks ugly w/o "trunk-context" :-)

>
>Sure; in the next rev, I will spell out the interaction between
>these with an example or so.

Would you be able to post your text/example to list before submitting new
rev? It may save another round of commenting.

Thanks,

Shan Lu

>
>Thanks,
>
>- vijay
>-- 
>Vijay K. Gurbani  vkg@{lucent.com,research.bell-labs.com,acm.org}
>Wireless Networks Group/Internet Software and Services
>Lucent Technologies/Bell Labs Innovations, 2000 Lucent Lane, Rm 6G-440
>Naperville, Illinois 60566     Voice: +1 630 224 0216
>
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