Subject: [Sip] Call establishment over TCP

From: "Shankara, Udaya" <[email-masked]>
Date: Fri, 12 Apr 2002 09:24:51 -0700

Hi,
    Let us consider a call between 2 UAs over TCP:
       UA1   <--------->    UA2

UA1 sends an INVITE to UA2 over TCP (channel 1). The Contact header of
INVITE contains UA1's IP address and port 8000. UA2 responds to INVITE over
channel 1 and ACK is also sent over the same channel.

   Let us assume that UA2 determines to terminate the call. The question is:
 
Does UA2 send BYE over channel 1 or does it open a new TCP connection
(channel 2) to the server running at port 8000?

Regards,
Udaya

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