On Fri, 2005-10-07 at 14:12 -0400, kaiduan xie wrote:
> Hi,
> 
> Does brach ACK parameter in ACK for 200 for INVITE
> should be same as the INVITE which intiates the
> session?

> These two branch parameters value can be different.
> Any comments?

Actually, the branch paramater of an ACK for a 2xx response *must* be
different from that of the INVITE because it is a separate transaction
from the INVITE.  (The ACK of a non-2xx is part of the same
transaction.)  This is detailed somewhere in 3261.

Dale


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