[SIPForum-discussion] 183 response code

[mustafa aydin]

Hi Jing,
In addition to Vivek`s comment; the client must send prack with SDP if the 
invite has no offer;

RFC 3262;

If the UAC receives a reliable provisional response with an offer
   (this would occur if the UAC sent an INVITE without an offer, in
   which case the first reliable provisional response will contain the
   offer), it MUST generate an answer in the PRACK.  If the UAC receives
   a reliable provisional response with an answer, it MAY generate an
   additional offer in the PRACK.  If the UAS receives a PRACK with an
   offer, it MUST place the answer in the 2xx to the PRACK.

Regards,
Mustafa Aydin




________________________________
From: Vivek Batra <Vivek.Batra at matrixcomsec.com>
To: Jing Jiang <jjiang at biamp.com>; discussion at sipforum.org
Sent: Sat, December 4, 2010 6:14:32 AM
Subject: Re: [SIPForum-discussion] 183 response code


Hi,
 
Yes with PRACK if 100rel is used.
No if 100rel is not used.
Refer RFC 3262 for more details.
 
Best Regards,
Vivek Batra
 
From:discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org] On 
Behalf Of Jing Jiang
Sent: Saturday, December 04, 2010 1:22 AM
To: discussion at sipforum.org
Subject: [SIPForum-discussion] 183 response code
 
When 183 response message  with SDP is received, should the client ack this 
message?
 
Jing Jiang 
 
 

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