Subject: [SIP] questions on SIP/SDP

From: "rahul pande" <[email-masked]>
Date: Fri, 04 Aug 2000 13:43:51 GMT

hi all,
  i have few queries to ask :

1) if caller requests the foll.
      m=<some description> 0 1
      a=sendrecv
  if the callee supports only sendonly with 0
   and recvonly with 1 then how can he specify this
   in his response
would it be:
      m=<some description> 0
      a=sendonly
      m=<some description> 1
      a=recvonly
  but the above will voilate the sip rfc where it specifies that
there should be one to one mapping b/w the requests and the response.

2) The netmeeting tool of Microsoft implements the H323 stack and there
we have a provision for file transfer too, can we do the same using SIP 
stack,
but how will we convey the request in the SDP.

3) another query on SDP responses:
   if caller sends a request:
      m=<some description> <fmt>
      a=recvonly
   and the callee supports it, does it have to change the a= value to
   sendonly in the response i.e.
      m=<some description> <fmt>
      a=sendonly
   or the above will be assumed by the caller on receipt of the positive
response

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