[SIPForum-discussion] A and B with G.711

Vivek Batra Vivek.Batra at matrixtelesol.com
Fri May 15 03:59:20 UTC 2009

In confirm dialog, you can negotiate SDP using Re-INVITE however you can
again negotiate the SDP in early dialog using UPDATE.


From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of Underwood, Rosa
Sent: Friday, May 15, 2009 3:12 AM
To: Jyothi Laxmish; discussion at sipforum.org
Subject: Re: [SIPForum-discussion] A and B with G.711

I believe a reINVITE should be used since the change will be during an
established dialog.    RFC 3261 should provide guidance. 

From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of Jyothi Laxmish
Sent: Thursday, May 14, 2009 6:15 AM
To: discussion at sipforum.org
Subject: [SIPForum-discussion] A and B with G.711

Hi all


    Suppose A and B are in conversation stage with g.711 codec.

     A want to change his codec with g.729 ( any other also)   which B
supports. In this

   Scenario how A has to communicate with B  in Sip. Whether UPDATE can be
used? If yes how?







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