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

Tue May 1 04:29:11 UTC 2007

Thanks Surya

For your input...
But My comment I have is if User A has not registered and he is able to initiate a call and that call is getting success, If he is a un-registered then how User A will be charged for this call ? or is there no charge to User A for the call. If its like that then any user can call with out any charge and its something like cheating the system.

Another Comment: When Un-registered User-A initiate a call, Is there not any database look up for User A whether its registered or not?

Thanks
Santosh

----- Original Message ----
From: Surya Prakash Ummadi <suryaprakashu at rediffmail.com>
To: santosh patra <skp10_9559 at yahoo.co.in>
Cc: discussion at sipforum.org
Sent: Monday, 30 April, 2007 9:52:57 PM
Subject: Re: [SIPForum-discussion] Issue in Initiation/Termination of call with De-Registered User

Hi santhosh,

  In the first scenario UserA is calling UserB,when User A calls UserB proxy  looks in the location service to get the contact of the User B and checks for the UserB's registration is valid or not .Since it is valid ,the call is established.

  In the second scenario,UserB calls User A and when INVITE is received at the proxy ,it looks at the location service to get the contact of the UserA ,since UserA is deregistered already,it respond with 4xx response.

comment on it

regards

surya  

On Mon, 30 Apr 2007 santosh patra 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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