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

[Abinash Sarangi]

Hi Santosh,
For an outgoing call if its on-net and proxy is involved only then call will be established based on registration status of called party.In the same scenario if the UAS is B2BUA or lets say UAs are hooked up to a 3PCC then call will be rejected based on registration status of calling party as well.For offnet calls behaviour may be changed.
In case of incoming calls the registration status of the party involved is always checked..hope it clears the cloud

Abinash Sarangi
 


Date: Mon, 30 Apr 2007 16:22:57 +0000From: suryaprakashu at rediffmail.comTo: skp10_9559 at yahoo.co.inCC: discussion at sipforum.orgSubject: 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 itregardssurya  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>>>>>      Send a FREE SMS to your friend's mobile from Yahoo! Messenger. Get it now at http://in.messenger.yahoo.com/>_______________________________________________>This is the SIP Forum discussion mailing list>TO UNSUBSCRIBE, or edit your delivery options, please visit http://sipforum.org/mailman/listinfo/discussion>Post to the list at discussion at sipforum.org




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