Hi,
I am reposting my query. Hoping to receive a response atleast this time.
Section 16.6 bullet 11
"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."
>From this it is clear that Timer C should be started when request is
proxied.
what is the use of Timer B in Proxies?? Because default value of Timer B
seems to 64*T1 whereas minimum value of Timer C should be 3 minutes.
Starting Timer C after receiving the first 1xx response and refreshing it
on subsequent provisional responses (non-100) sounds fine. This is the
behaviour given in bis-05. Why has this been changed in bis-09.
Thanks in advance
- Vijay
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