[SIPForum-discussion] Issue in Initiation/Termination of call with De-Registered User

[raman kumar]

User A is sending his contact in the contact header but to know the
contact of the called party eg. user B in your case, it should be
registered.

See the Invite message generated by user A you will notice even
unregisterd it is sending its local contact in the contact header.


On 30/04/07, santosh patra <skp10_9559 at yahoo.co.in> wrote:
> Hello All
>
> I am facing problem in the following scenario...So the Scenario is,
>
> User A and B has registered in SIP server and expire header is 4 hour i.e.
> 14,600 seconds.
> User A has been deregistered with Expiry:0.
>
> case1:De-registered User A is trying to initiate a call to registered User B
> and the call is getting success means User B is getting the call and Media
> path has also been estabilshing, Is the call should sucessful? If yes, then
> how?
>
> but in Case2: when User B is trying to call De-registered user A then call
> is not successful and getting 4xx error response.
>
> Here I am getting confused that when User A has deregistered from Registrar
> then there is no information of User A in Registrar and How User A is able
> to initiate a call with out registration?
>
> But RFC-3261 doesn't talk about initiation and Termination of call after
> deregistering the user.
> If any RFC/standard says about such scenarios then please let me know.
>
> Please help me on this Scenario.
>
> Thanks in Advance
> Santosh
>
>
>
>
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