[SIPForum-discussion] Can both 180 & 200 contain SDP?

[Martien Huysmans]

Tomasz
 
Agree, but as the provisional response is not send reliable, the UAS can
not know if
it arrives. Because of that the "final SDP answer" also has to be
included a reliable
non-failure message (200 OK for RFC3261).
Something else to take into account is that a new offer-answer cycle can
only start after the
SDP has been send / received reliable. So (in case of RFC3261), the UAC
has to wait 
until 200OK (with final SDP), even if it already has received the SDP in
a provisional response. 
 
Regards Martien
 
________________________________

From: Tomasz Zieleniewski [mailto:tzieleniewski at gmail.com] 
Sent: Monday, May 04, 2009 10:28 PM
To: Martien Huysmans
Cc: SIP FORUM
Subject: Re: [SIPForum-discussion] Can both 180 & 200 contain SDP?


Hi,

According to the same clause 13.2.1 from RFC 3261
the same SDP answer may be placed in any provisional response.
In this case UAC must treat the first received SDP as final one and must
ingnore any further responses.

Kind regards,
- Tomasz


2009/5/4 Martien Huysmans <martien.huysmans at ericsson.com>


	Hi
	 
	Please take into account that the SDP must be send in a reliable
non-failure message from the UAS.
	See RFC3261-clause 13.2.1
	 
	Regards Martien 

________________________________

	From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of Tomasz
Zieleniewski
	Sent: Monday, May 04, 2009 9:12 AM
	To: amirul ahsan
	Cc: SIP FORUM
	Subject: Re: [SIPForum-discussion] Can both 180 & 200 contain
SDP?
	
	
	Hi,
	
	UAS may send SDP in 180 Session Progress response.
	UAC must then treat those media description as the final one
	and must ignore any SDP in subsequent responses.
	
	Kind regards,
	Tomasz Zieleniewski
	
	
	
	2009/5/3 amirul ahsan <panna108 at yahoo.com>
	

HI,

Plz let me know, if both 180 Ringing & 200 Ok cantain SDP .

Thanks in advance.

// BR,

Amirul
	


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