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

Wed May 2 04:52:36 UTC 2007

Hello Michael

Ok, I agree with you that an un-ragistered user can initiate a call but what about if Callee terminates the call that means Callee will send Bye to Un-Registered caller, Is this will work?

Santosh

----- Original Message ----
From: Michael Cohen <reliagility at gmail.com>
To: santosh patra <skp10_9559 at yahoo.co.in>
Cc: Raghu Narasimhan <raghu.united at gmail.com>; raman kumar <ramank24 at gmail.com>; discussion at sipforum.org
Sent: Tuesday, 1 May, 2007 5:31:33 PM
Subject: Re: [SIPForum-discussion] Issue in Initiation/Termination of call with De-Registered User

Hi all.  It is my understanding that the purpose of registration is so that the registered UA can receive incoming calls.

There is nothing to prevent an unregistered user from calling a registred user.  

In fact, if a user-agent does not plan on receiving calls there is no reason for it to be registered.

If you dont want an _unauthorized_ user-agent to be able to call a registered user-agent, you can  turn on invite authentication, if your proxy supports it.

-Mike

On 5/1/07, 
santosh patra <skp10_9559 at yahoo.co.in> wrote:
Yes Raghu...He should get 403 client error but in this case call is getting eastblished.

And As far as my experience says call should not established and That's why basically I asked is there any such there implementation, which case I have not come across?

----- Original Message ----
From: Raghu Narasimhan <raghu.united at gmail.com>
To: raman kumar <
ramank24 at gmail.com>
Cc: santosh patra <
skp10_9559 at yahoo.co.in>; discussion at sipforum.org
Sent: Tuesday, 1 May, 2007 1:07:27 PM
Subject: Re: [SIPForum-discussion] Issue in Initiation/Termination of call with De-Registered User

if de-registered user tries to
 initiate a call, should he not get a
403 Forbidden ?

On 5/1/07, raman kumar <ramank24 at gmail.com
> wrote:
> 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
> >
> >
> >
> >
>
 >       Send a FREE SMS to your friend's mobile from Yahoo! Messenger. Get it
> > now at http://in.messenger.yahoo.com/

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-- 
Yours Truly

Raghu Narasimhan

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