[SIPForum-discussion] SIP 180 ringing

[John Downing]

Hi Walid:

A 183 call progress from the PSTN gateway is normal.  You would not expect
a 180.  The 183 should have an SDP attached to allow one way RTP audio.
 The call progression indicators from the PSTN (ringing, busy, etc) are
then presented to the caller.

We setup these test calls and troubleshoot them in our SIP Training class.

http://www.trainingcity.com/course_outline_detail.asp?courseid=2004

On Tue, May 8, 2012 at 5:35 AM, Walid Hbiriq <hbiriq.walid at gmail.com> wrote:

> Hello all,****
>
> ** **
>
> I have the following problem :****
>
> ** **
>
> **-          **When testing output calls ,we can’t receive SIP message
> 180 ringing in the trace (wireshark),we have only 183 progress ?****
>
> **-          **The call proceed like this operator x => SBC => operator y*
> ***
>
> Can anyone tell me what can be the reason?****
>
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-- 
Thanks... John

John Downing
John at TrainingCity.com
613-435-1170 (w)
613-883-1235 (c)
johndowning (Skype)
www.twitter.com/TrainingCity
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