[SIPForum-discussion] 183 Session Progress with SDP missing info

[Munjal Patel]

Tomi you were correct spoke with my carrier they found the issue and removed the ULC giving those bad 183's

Thanks everybody 

Sent from my iPhone

On Jun 11, 2012, at 1:13 PM, Lindström Tomi <tomi.lindstrom at aina.fi> wrote:

> You are right there should be a-line for that g.729 and Cisco is working Like it supposed.
> 
> Br Tomi 
> From: Munjal Patel
> Sent: 11.06.2012 14:34
> To: discussion at sipforum.org
> Subject: [SIPForum-discussion] 183 Session Progress with SDP missing info
> 
> hi everyone i'm new to SIP and needing some help with a issue i'm having, any help would be appreciated 
> 
> A= Cisco 2811 UAC
> B= Carrier end point
> 
> During call setup carrier is responding back with 183 Session Progress SDP but with missing “a”-Line, here is the snips from the PCAP:
> 
> 
> Invite- A to B (SIP/SDP)
> 
> SDP>
> (M): audio 47640 RTP/AVP 18 101
> (A): rtpmap:18 g729/8000/1
> (A): rtpmap:101 telephone-event/8000/1
> (A): ptime:20
> 
> 100 Trying- B to A (SIP)
> 
> 183 Session Progress- B to A (SIP/SDP)
> 
> SDP>
> (M): audio 60050 RTP/AVP 18 101
> (A): rtpmap:101 telephone-event/8000/1
> (A): ptime:20
> 
> Cancel- A to B (SIP)
> 
> 
> My question, is it normal for Cisco 2811 to send a cancel or can it be configured to try to renegotiate media with the carrier.
> 
> 
> Thank You,
> 
> Munjal Patel
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sipforum.org/pipermail/discussion/attachments/20120611/b2b06438/attachment-0002.html>