[SIPForum-discussion] ACK with SDP & BYE

[Zahir Jamizadeh]

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