[SIPForum-discussion] use of multiple contact

[abhishek.chattopadhyay at wipro.com]

Yes, multiple contacts can be present in responses but not in requests.
Although the response is sent according to the via header of the
request, but still having multiple contacts in a request would make it
very confusing for a UAS to understand which UAC is actually to be
contacted. Generally further requests generated by the UAC would be
depending on the Contact header of the previously incoming related
Request.

 

And you are absolutely correct, a redirect server can send 3xx messages
with multiple contact information.

 

 

Regards 
ABHISHEK 

 

________________________________

From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of prakash k
Sent: Monday, June 08, 2009 9:57 PM
To: vikasraigupta at gmail.com; discussion at sipforum.org
Cc: abhishek.chattopadhyay at contactwipro.com
Subject: Re: [SIPForum-discussion] use of multiple contact

 

Hi Abishek,

I have one doubt if there is no concept of  multiple contact in SIP then
how come this forking concept will be there?
Also there is possibility of multiple contact in responses sent by
redirection server.

 

Regards
Prakash k

 

 

________________________________

From: "abhishek.chattopadhyay at wipro.com"
<abhishek.chattopadhyay at contactwipro.com>
To: vikasraigupta at gmail.com; discussion at sipforum.org
Sent: Monday, 8 June, 2009 1:17:35 PM
Subject: Re: [SIPForum-discussion] use of multiple contact

Contact should be only one according to RFC3261.
BTW what might be the use of more than one ? 
Moreover sip dialogs are peer to peer relationships.



Regards 
ABHISHEK


-----Original Message-----
From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of VG
Sent: Saturday, June 06, 2009 10:57 AM
To: discussion at sipforum.org
Subject: [SIPForum-discussion] use of multiple contact

hi,

In sip is their any mechanism to provide multiple contact information.

Also if UAS wants to keep only first contact then what message will it
shoot to UAC.

Regards,
VG
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