Hi,
a snippet from 3311:
If a UA receives a non-2xx final response to a UPDATE, he session
parameters MUST remain unchanged, as if no UPDATE had been issued.
Note that,
as stated in Section 12.2.1 of RFC 3261 [1], if the non-2xx final
response is a
481 (Call/Transaction Does Not Exist), or a 408 (Request Timeout), or no
response at all is received for the UPDATE (that is, a timeout is
returned by
the UPDATE client transaction), the UAC will terminate the dialog.
If we receive 404 response for the subsequent session refresh
requests, do we need to terminate the session by sending BYE?
Please clarify.
Regards
Vijayakumar M.G.
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