[Serusers] onreply_route and stopping 183 messages

Marian Dumitru marian.dumitru at voice-sistem.ro
Wed Jan 26 21:41:14 CET 2005


Hi Richard,

Simon said the 183 has no SDP .... so, this might not be the case.

Best regards,
Marian

Richard wrote:
> If the CPE is behind a firewall, the early media may not be able to get
> through. That's another reason that I don't like any gateway not capable of
> sending 180 instead of 183.
> 
> Richard
> 
> 
> 
>>-----Original Message-----
>>From: Marian Dumitru [mailto:marian.dumitru at voice-sistem.ro]
>>Sent: Wednesday, January 26, 2005 10:02 AM
>>To: Simon Miles
>>Cc: 'Richard'; serusers at lists.iptel.org
>>Subject: Re: [Serusers] onreply_route and stopping 183 messages
>>
>>Hi Simon,
>>
>>Simon Miles wrote:
>>
>>>That's my problem, the gateway does send the 180 after the 183
>>
>>The GW cannot send a 180  after 183 - it's against the RFC
>>
>>but still
>>
>>>the CPE does not generate the ringtone. I was wondering if the 183 was
>>>upsetting the CPE and so trying to remove it.
>>
>>My guess is it's the CPE client's fault. If a 180 was received and it
>>gets a 183 without SDP, it should ignore the 183 and stick to 180 and
>>play the local ringing tone.
>>
>>Regards,
>>Marian
>>
>>
>>>Simon
>>>
>>>-----Original Message-----
>>>From: Richard [mailto:richard at o-matrix.org]
>>>Sent: 26 January 2005 19:17
>>>To: 'Simon Miles'; marian.dumitru at voice-sistem.ro
>>>Cc: serusers at lists.iptel.org
>>>Subject: RE: [Serusers] onreply_route and stopping 183 messages
>>>
>>>
>>>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
>>>>>>
>>>>>>
>>>>>>--------------------------------------------------------------------
>>>>>>--
>>>>>>--
>>>>>>
>>>>>>_______________________________________________
>>>>>>Serusers mailing list
>>>>>>serusers at lists.iptel.org http://lists.iptel.org/mailman/listinfo/serusers
>>>>>
>>>>>
>>>>--
>>>>Voice System
>>>>http://www.voice-system.ro
>>>>
>>>>_______________________________________________
>>>>Serusers mailing list
>>>>serusers at lists.iptel.org http://lists.iptel.org/mailman/listinfo/serusers
>>>
>>>
>>>
>>--
>>Voice System
>>http://www.voice-system.ro
> 
> 
> 

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Voice System
http://www.voice-system.ro




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