[Serusers] Re: Xten-RTPProxy choppy audio

[Maxim Sobolev]

Ok, I see, probably it tries to send a RTCP packet, which is OK by 
itself, but handles resulting ICMP in a strange way. I'll extend RTP 
proxy to make it relaying RTCP traffic as well (I am having it on a TODO 
list for a quite some time now), which should fix this problem.

Thank you for the debugging!

In the meantime, disabling RTCP in X-Ten should solve the problem.

-Maxim

Ricardo Villa wrote:

> I can confirm this too.  Just tried it in our lab with the exact same
> results as Klaus.  (Instead of Budgetone I used ATA186).
> 
> X-Lite build 1084
> 
> 1.  ATA186 Calls Xten.
> 2.  Xten hears choppy audio every 5 seconds or so.
> 3.  RTP Stream from ATA to Xten is perfect and conserves the same SSRC
> 4.  RTP Stream from Xten to ATA switches to a new SSRC every few seconds.
> 
> It is clear to me that there is a bug in Xten software.  Before Xten
> switches to a new SSRC it attempts to send an RTP packet to the wrong RTP
> Port (it tries to the actual port +1).   SER server sends back "ICMP Port
> Unreacheable (Obviously)" and Xten restarts RTP Stream on a new SSRC.
> 
> I did not see any problem with Maxims RTPProxy.
> 
> Regards,
> Ricardo
> 
> ----- Original Message ----- 
> From: "Klaus Darilion" <darilion at ict.tuwien.ac.at>
> To: "Jan Janak" <janak at fokus.fraunhofer.de>; "Adrian Georgescu"
> <ag at ag-projects.com>
> Cc: <serusers at lists.iptel.org>; "Ricardo Villa" <ricvil at epm.net.co>
> Sent: Wednesday, December 10, 2003 11:07 AM
> Subject: RE: [Serusers] Re: Xten-RTPProxy choppy audio
> 
> 
> I can reproduce the choppy audio
> setup:
> budgetone-100 <----> ser+rtpproxy(version from today) on redhat 9 (or 8,
> not sure) <------>x-lite build 1088 on win xp
> 
> the choppy sound occours every 5 seconds, in both directions.
> RTP-analysis:
> RTP stream from budgetone to x-lite (via rtpproxy) is fine (no jitter,
> no loss)
> RTP stream from x-lite to budgetone (via rtpproxy): very strange: x-lite
> switches to a new SSRC (and seq-nr. start at 0 again) every 5 seconds.
> 
> so, in my opinion: rtpproxy works fine, x-lite is guilty. but why does
> this happen only if the rtp proxy is involved? ...further investigations
> are planned...
> 
> Klaus
> 
> 
>>-----Original Message-----
>>From: Jan Janak [mailto:janak at fokus.fraunhofer.de]
>>Sent: Wednesday, December 10, 2003 4:09 PM
>>To: Adrian Georgescu
>>Cc: serusers at lists.iptel.org; Ricardo Villa
>>Subject: Re: [Serusers] Re: Xten-RTPProxy choppy audio
>>
>>
>>Well, we can generate the traces locally, but I haven't encounter the
>>problem you describe so it makes no sense.
>>
>>You wrote you are able to reproduce the problem, in that case I would
>>like to ask you to generate the traces that show the problem
>>so we could
>>analyze and fix it.
>>
>>Also please tell us on what OS does this happen ? (I mean the
>>OS the proxy
>>is running on).
>>
>>Another question, what is the license of your RTP proxy ? I
>>didn't find
>>any licensing info in the sources. Will the sources be available ?
>>
>> Jan.
>>
>>On 10-12 16:04, Adrian Georgescu wrote:
>>
>>>On Wednesday, Dec 10, 2003, at 15:48 Europe/Amsterdam,
>>
>>Ricardo Villa
>>
>>>wrote:
>>>
>>>
>>>>Adrian,
>>>>
>>>>Do you have an Etheral trace trace of such a call (using G711)?
>>>
>>>I guess  ethereal traces can be generated with ethereal program and
>>>decoded locally on your servers if you want to isolate this.
>>>
>>>
>>>>I can
>>>>decode it and produce an audio file for all to examine.
>>
>>This way we
>>
>>>>can get
>>>>to the bottom of this.
>>>>Thanks,
>>>>Ricardo
>>>
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> 
> 
> 
> 
> 
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