[Serusers] onreply_route and stopping 183 messages

[Marian Dumitru]

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
>>>>
>>>>
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>>>
>>>
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>>
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> 
> 
> 

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