Re: [Sip] [Sip-implementors] Different SDP Session Version in 183 &200 OK

["Jaiswal, Sanjiv (NSN - IN/Bangalore)" <[e-mail]>]

Hi Nitin,


Every SDP with incremented session ( in this case 200 OK) is treated as
new negotiation(offer).
Whether ACK from other end contains SDP answer? If yes then session
version is incremented there also?


Regards
Sanjiv

-----Original Message-----
From: [e-mail]
[mailto:[e-mail]] On Behalf Of ext
Nitin Kapoor
Sent: Wednesday, March 09, 2011 3:03 PM
To: Ashish Saxena
Cc: [e-mail]; [e-mail]
Subject: Re: [Sip-implementors] [Sip] Different SDP Session Version in
183 &200 OK

Hello Ashish,

Here is the mline for both the messages.

183:

Media Description, name and address (m): audio 43888 RTP/AVP 18

200 OK:

Media Description, name and address (m): audio 43888 RTP/AVP 18

Thanks,
Nitin Kapoor


On Wed, Mar 9, 2011 at 3:25 AM, Ashish Saxena
<[e-mail]>wrote:

> what is the mline of 200OK SDP.
>
> Regards
> Ashish Saxena
> (www.aricent.com)
> ________________________________________
> From: [e-mail] [[e-mail]] On Behalf Of Nitin
> Kapoor [[e-mail]]
> Sent: Wednesday, March 09, 2011 12:54 PM
> To: [e-mail]
> Cc: [e-mail]
> Subject: Re: [Sip] Different SDP Session Version in 183 & 200 OK
>
> Hello All,
>
> Could any one please help me out on requested query as below.
>
> Thanks,
> Nitin
>
> On Tue, Mar 8, 2011 at 4:48 PM, Nitin Kapoor <[e-mail]
> <mailto:[e-mail]>> wrote:
> Dear All,
>
> I have one call scenario where my termination is sending the SDP in
183 as
> well as in 200 OK also. As far as i know if we are getting SDP in 183
> session progress then my UAC can ignore the SDP in 200 OK. Also most
of the
> time SDP is same.
>
> But here i noticed the slight difference of "Session Version". Here
when my
> termination is sending 188 Session Progress with SDP is sending the
SDP as
> below.
>
> I can see that  my Termination is incrementing  "Session Version" for
SDP
> in 183 & 200 OK in same dialog..
>
> 183 with SDP
>
> S_OWNER : o=TLPMSXP2 22660 22660 IN IP4 69.90.230.210
> S_NAME : s=sip call
> S_CONNECT : c=IN IP4 69.90.230.217
> TIME : t=0 0
> M_NAME : m=audio 59072 RTP/AVP 18 4 8 98
>
> 200 OK with SDP:
>
> S_OWNER : o=TLPMSXP2 22660 22661 IN IP4 69.90.230.210
> S_NAME : s=sip call
> S_CONNECT : c=IN IP4 69.90.230.217
> TIME : t=0 0
>
> Could anyone please let me know if that is okay to increment the
session
> version and if any supported document is there?
>
> Thanks,
> Nitin
>
>
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