[SIPForum-discussion] SIP 180 ringing

[John Downing]

Hi Walid:

There should not be a 180 Ringing.  It is not part of the call flow.  Your
phone should establish one way audio based on the 183/SDP.  Perhaps your
SBC is not allowing the RTP to flow to the caller?

On Wed, May 9, 2012 at 10:41 AM, Walid Hbiriq <hbiriq.walid at gmail.com>wrote:

> Hi John,****
>
> ** **
>
> It’s ok about the two SDP msg ,i will send you a trace an you will see
> that there is no 180 ringing.****
>
> ** **
>
> *De :* John Downing [mailto:john at trainingcity.com]
> *Envoyé :* mercredi 9 mai 2012 12:29
>
> *À :* Walid Hbiriq
> *Cc :* discussion at sipforum.org
> *Objet :* Re: [SIPForum-discussion] SIP 180 ringing****
>
> ** **
>
> Hi Walid:****
>
> ** **
>
> Make sure you are receiving an SDP with the 183.  The caller should
> receive two SDP msgs.  The first with the 183 to establish one way audio,
> allowing the caller to hear the call progression coming from the PSTN.  The
> second SDP is sent with the 200OK when the PSTN target answers to establish
> full duplex audio.****
>
> On Wed, May 9, 2012 at 5:46 AM, Walid Hbiriq <hbiriq.walid at gmail.com>
> wrote:****
>
> Hi John ,****
>
> The problem is not that i expect 180 or not ,but the caller (me) can’t
> hear the ringing .when I make the call ,I hear silence and then RTP is
> established .****
>
>  ****
>
> You get my mean?****
>
>  ****
>
> *De :* John Downing [mailto:john at trainingcity.com]
> *Envoyé :* mardi 8 mai 2012 20:26
> *À :* Walid Hbiriq
> *Cc :* discussion at sipforum.org
> *Objet :* Re: [SIPForum-discussion] SIP 180 ringing****
>
>  ****
>
> 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****
>
>  ****
>
>
>
> ****
>
> ** **
>
> --
> Thanks... John
>
> John Downing
> John at TrainingCity.com
> 613-435-1170 (w)
> 613-883-1235 (c)
> johndowning (Skype)
> www.twitter.com/TrainingCity****
>
> ** **
>



-- 
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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