10 Dec
2003
10 Dec
'03
6:45 p.m.
Hi Adrian!
Does your media proxy also forward RTCP packets?
Klaus
-----Original Message-----
From: Adrian Georgescu [mailto:ag@ag-projects.com]
Sent: Wednesday, December 10, 2003 5:44 PM
To: Ricardo Villa
Cc: serusers(a)lists.iptel.org
Subject: Re: [Serusers] Re: Xten-RTPProxy choppy audio
Interesting, did you try my media proxy before saying this?
Regards,
Adrian
On Wednesday, Dec 10, 2003, at 17:40 Europe/Amsterdam, Ricardo Villa
wrote:
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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(a)ict.tuwien.ac.at>
To: "Jan Janak" <janak(a)fokus.fraunhofer.de>de>; "Adrian
Georgescu"
<ag(a)ag-projects.com>
Cc: <serusers(a)lists.iptel.org>rg>; "Ricardo Villa"
<ricvil(a)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@fokus.fraunhofer.de]
> Sent: Wednesday, December 10, 2003 4:09 PM
> To: Adrian Georgescu
> Cc: serusers(a)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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