[SIPForum-discussion] Issue in Initiation/Termination of callwithDe-Registered User

Thu May 3 04:58:13 UTC 2007

If its not end-to-end call between A to B and Server is in between then what will be the case?
----- Original Message ----
From: Srinivas . <nsrinivas at TechMahindra.com>
To: William Prusty <williamp at TechMahindra.com>; santosh patra <skp10_9559 at yahoo.co.in>; discussion at sipforum.org
Sent: Wednesday, 2 May, 2007 4:24:59 PM
Subject: RE: [SIPForum-discussion] Issue in Initiation/Termination of  callwithDe-Registered User

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From:
 William Prusty 

Sent: Wednesday, May 02, 2007 3:44
PM

To: Srinivas .; 'santosh patra';
'discussion at sipforum.org'

Subject: RE: [SIPForum-discussion]
Issue in Initiation/Termination of callwithDe-Registered User

Now A is not registered means A has no
contact header filed. 

[Srinivas]  It is nothing to do with registration and
contact. Suppose if there is a direct call between end points A and B (no
server in between).

When INVITE is sent out from user A, it carries CONATCT field.

Suppose session is going between A &
B. if  B wants to  send BYE request to A means it has to send that 

BYE request to A’s contact field.
But as A is not registered it has not any   CONTACT headerfield
associated . So in thji case to which address B  has to send BYE 

[Srinivas] User B has request URI information (i.e address
of User A). It sends BYE to that address. 

Hope I am correct.

Plz answer                                                                    

From: Srinivas . 

Sent: Wednesday, May 02, 2007 2:59
PM

To: William
 Prusty ; 'santosh patra'; 'discussion at sipforum.org'

Subject: RE: [SIPForum-discussion]
Issue in Initiation/Termination of callwithDe-Registered User

I am not very clear about your question.

Still, if B wants to send BYE, it will
process in the same way as INVITE.

From:
 William Prusty 

Sent: Wednesday, May 02, 2007 2:15
PM

To: santosh patra; Srinivas .;
discussion at sipforum.org

Subject: RE: [SIPForum-discussion]
Issue in Initiation/Termination of callwithDe-Registered User

Suppose session is going between A &
B. if  b wants to send BYE to A in which address it will send BYE(
bcz  A don’t possess any CONTACT header field  as it has been
deregistered)

Plz answer

From:
discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org] On Behalf Of santosh patra

Sent: Wednesday, May 02, 2007 1:28
PM

To: Srinivas .;
discussion at sipforum.org

Subject: Re: [SIPForum-discussion]
Issue in Initiation/Termination of callwithDe-Registered User

Thanks for your comments..

How about charging/billing will work in this scenario and who will be charged
and how?

In this case can it be possible to terminate the call from Registered user to
Un-registered User, If Yes then How?

Santosh

----- Original Message
----

From: Srinivas . <nsrinivas at TechMahindra.com>

To: santosh patra <skp10_9559 at yahoo.co.in>; discussion at sipforum.org

Sent: Wednesday, 2 May, 2007 12:05:16 PM

Subject: RE: [SIPForum-discussion] Issue in Initiation/Termination of call
withDe-Registered User

Santhosh my comments inline.

From:
discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org] On Behalf Of santosh patra

Sent: Monday, April 30, 2007 8:08
PM

To: discussion at sipforum.org

Subject: [SIPForum-discussion]
Issue in Initiation/Termination of call withDe-Registered User

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?

[Srinivas] Call should go because in SIP registration is
used for routing incoming SIP requests (INVITE or other request messages coming
to user A).

 It has no role in authorizing outgoing request (INVITE or other request
messages going to user B).

but in Case2: when User B is trying to call De-registered user A then call is
not successful and getting 4xx error response. 

[Srinivas] Call should fail, for the incoming call proxy
authorizes the incoming call. As the user A is deregistered call will fail.

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?

[Srinivas] Proxy will take care of call setup not registrar.
 If your invite carries information of User B

But RFC-3261 doesn't talk about initiation and Termination of call after
deregistering the user.

[Srinivas] Search for key word “no
role in authorizing” in section 4 of RFC 3261.

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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