Hi All,
I meet a problem about Timer C mention in section "16.6 Request Forwarding"(RFC3261)
It says:
" 11. Set timer C
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. Timer C MUST be set for each client transaction when
an INVITE request is proxied. The timer MUST be larger than 3
minutes. Section 16.7 bullet 2 discusses how this timer is
updated with provisional responses, and Section 16.8 discusses
processing when it fires."
I want to ask:
In a stateful proxy, when a proxy receives an INVITE, proxy creates
an INVITE client transaction, and then puts it to transport layer to send,
and set Timer B(64*T1), for the INVITE client transaction, if Timer B fires,
the client transaction is destroyed then. But the Timer C set to 3 minutes at least
according to RFC3261. 3 minutes >> 64*T1, when Timer C fires, what can the
proxy do then for the INVITE client transaction is "dead" already?
Thanks to give an answer!
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