[Serusers] onreply_route and stopping 183 messages

Richard richard at o-matrix.org
Wed Jan 26 20:16:30 CET 2005


I ran into the same problem before. The quick fix is to let gateway send 180
instead of 183. It would allow the ip phones to generate local ringback
tone.

Richard


> -----Original Message-----
> From: serusers-bounces at iptel.org [mailto:serusers-bounces at lists.iptel.org] On
> Behalf Of Simon Miles
> Sent: Wednesday, January 26, 2005 8:46 AM
> To: marian.dumitru at voice-sistem.ro
> Cc: serusers at lists.iptel.org
> Subject: RE: [Serusers] onreply_route and stopping 183 messages
> 
> Yes the call is established at the end.
> 
> In the 183 message there is no media information, so I'm guessing that
> the gateway is not sending out an RTP stream and the CPE is not reacting
> to the ringing message ! !
> 
> Strange how it all works with a different gateway ! ! I do know that the
> CPE is working to RFC 2543 and the new gateway is RFC 3261 - but I'm
> told they are backward compatible.
> 
> 
> Simon
> 
> -----Original Message-----
> From: Marian Dumitru [mailto:marian.dumitru at voice-sistem.ro]
> Sent: 26 January 2005 18:27
> To: Simon Miles
> Cc: serusers at lists.iptel.org
> Subject: Re: [Serusers] onreply_route and stopping 183 messages
> 
> 
> Hi Simon,
> 
> Simon Miles wrote:
> > We have a problem with a piece of CPE after changing the PSTN gateway
> > manufacturer. We no longer get a ringing tone !
> 
> but at the end, it the call established? It's only about the missing
> ringing tone?
> 
> > So I was trying to emulate the original packet sequence and I noticed
> > that the new gateway sends out 183 messages. So I was trying to remove
> 
> > them just incase the CPE was getting confused.
> 
> 183 reply is used by gateways to send early media. In this case the
> ringing tone is actually send as RTP stream by the gateway (usually SIP
> devices play ringing tone locally when 180 received). Maybe your problem
> 
> is that the RTP media from 183 (check the SDP body) is not correct or
> the media itself doesn't contain the ringing sound :-).
> 
> 
> regards,
> Marian
> 
> >
> >
> > Simon
> >
> > -----Original Message-----
> > From: serusers-bounces at iptel.org [mailto:serusers-bounces at lists.iptel.org]
> > On Behalf Of Marian Dumitru
> > Sent: 26 January 2005 17:56
> > To: Simon Miles
> > Cc: serusers at lists.iptel.org
> > Subject: Re: [Serusers] onreply_route and stopping 183 messages
> >
> >
> > Hi Simon,
> >
> > Currently there is no way to drop a reply from onreply_route. Is this
> > really needed, no other way around?...maybe altering the reply... ?
> >
> > Regards,
> > Marian
> >
> > Simon Miles wrote:
> >
> >>I would like to stop 183 Session Progress messages. I can see then
> >>arriving and being dealt with by the onreply_route code, but how can I
> >
> >
> >>stop then being forwarded by the sip server ?
> >>
> >>Thanks
> >>
> >>
> >>Simon
> >>
> >>
> >>----------------------------------------------------------------------
> >>--
> >>
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> >>serusers at lists.iptel.org http://lists.iptel.org/mailman/listinfo/serusers
> >
> >
> 
> --
> Voice System
> http://www.voice-system.ro
> 
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