[SIPForum-discussion] ACK with SDP & BYE

[Garron, James]

If the phone is seeing the SDP in the ACK as a new offer then it should
send a BYE.  Need to better understand how the offer/answer is happening
in this flow 

e.g.  Is the 18x reliable, if yes it must contain the offer SDP, does
the PRACK contain the answer SDP, if not was there an UPDATE sent with
the answer SDP, if yes to either of those then the ACK should not
contain an SDP as it could be seen as a new offer resulting in the BYE.

-----Original Message-----
From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of Zahir Jamizadeh
Sent: Wednesday, March 23, 2011 8:16 AM
To: discussion at sipforum.org
Cc: CCurry at telovations.com
Subject: [SIPForum-discussion] ACK with SDP & BYE

Hi,
 I was trying to setup a call flow according to 3rd party call control
model flow 1 (RFC 3725 - Figure 1) using Cisco 7960 phones. In this 
 model, user A (which received an INVITE with no SDP) receives SDP
description in the ACK. In the Cisco phones, I noticed that as soon as 
 it received an ACK containing SDP, it sent a BYE.
 Has anyone else noticed this behaviour ?

BR

Zahir Jamizadeh



_______________________________________________
This is the SIP Forum discussion mailing list
TO UNSUBSCRIBE, or edit your delivery options, please visit
http://sipforum.org/mailman/listinfo/discussion
Post to the list at discussion at sipforum.org