Hi
All,
I a bit confused
about the need for Timer C.
Section
17.1.1.2 of bis-09 says "Timer B controls transaction timeouts" (in this
case INVITE client transaction).
And
in bullet 11 of
Section 16.6 of bis-09, it says that
"In order to handle the case where an INVITE request never generates
a final response, the TU uses a timer
which is called timer C....".
But,
it seems to me that Timer-B is already
taking care of this in a way. Because, (taking Fig.5 INVITE client transaction
as an example) if Timer B is fired, and no final responses were recd. before
then, it would move to the "Terminated" state. So the client-transaction gets
destroyed then.
So, how
is the separate Timer C helping us? And why is it larger
than 3-minutes?
Thanks &
Regards,
Nirmalya
