[Serusers] Re: Xten-RTPProxy choppy audio

[Adrian Georgescu]

On Wednesday, Dec 10, 2003, at 14:16 Europe/Amsterdam, Maxim Sobolev 
wrote:

> Probably you need to replace "we have solved" with "we don't observe", 
> because to say that something is "solved" you probably should be able 
> to describe what the solution is.

20+ of my customers have experienced a problem in the interaction 
between xten soft clients and the rtp media proxy. I have reported this 
to Maxim (3 november),  to xten (6 november) and ser user list  (6 
november).  I have received no answer, hence the effort we put in 
finding a solution ourselves.

Maxim, I have all respect for all you work.  For the sake of this, here 
is my correction:

"We don't observe this with our media proxy"

> Personally I am not convinced that there is actually a real problem 
> with our RTP proxy (my own tests and Jan's information confirms that),

Personally, I am totally convinced that I had a problem and I am am 
perfectly convinced that I solved my problem. I think this is the 
single point of arguing here.

> it could be just equially likely be the problem with your setup (OS 
> you are using, libraries, network etc).

It is not isolated to my setup. Before I have notified Maxim, Xten and 
SER user list,  I have reproduced the problem on different operations 
systems (Windows and MacOSX), different Xten versions, different 
firewalls (NET Gear, D-Link, Alcatel Speetouch and Linux masquerading) 
different IP networks and different sip server software.

> Therefore, I strongly suggest you to stop asserting that your version 
> is better

I wrote "alternative" version with different features. Nothing about 
"better". Your software is better :-)

> in this respect than original one unless you are able to tell where 
> the difference is or to provide instructions on how to reliably 
> reproduce the problem.

To reproduce this I start up Xten and make a call via the proxy.

> Thanks!

Welcome.

>
> -Maxim
>
> Adrian Georgescu wrote:
>
>> The problem is that every few seconds there is a gap of half second 
>> in  the audio stream (quality-wise the conversation is unacceptable) 
>> when  using Xten softphone X-lite or X-PRO on either Win or Mac via 
>> RTPProxy.  I can consistently reproduce this problem 100% on various 
>> systems and  so do all my customers.
>> For the sceptics, there is a movie with the problem presented  
>> (Quicktime is required to play the stream):
>> http://download.dns-hosting.info/SERMediaProxy/ 
>> XtenProblemWithRTPProxy.mov
>> and an audio extract:
>> http://download.dns-hosting.info/SERMediaProxy/ 
>> XtenProblemWithRTPProxy.wav
>> This is the problem solved in our media proxy.
>> Regards,
>> Adrian
>> On Wednesday, Dec 10, 2003, at 11:53 Europe/Amsterdam, Jan Janak 
>> wrote:
>>> I am also wondering what is the problem with xten and rtp proxy,  
>>> because
>>> I didn't have any problems.
>>>
>>>   Jan.
>>>
>>> On 10-12 12:29, Maxim Sobolev wrote:
>>>
>>>> Sorry for my sloppy English, actually I was asking you to explain 
>>>> the
>>>> cause of the problem. If you claim that something was "solved" in 
>>>> your
>>>> version you should probably know how behaviour of your version 
>>>> differs
>>>> from the behaviour of the original one.
>>>>
>>>> -Maxim
>>>>
>>>> Adrian Georgescu wrote:
>>>>
>>>>> See  
>>>>> http://lists.iptel.org/pipermail/serusers/2003-November/003499.html
>>>>>
>>>>> On Wednesday, Dec 10, 2003, at 11:07 Europe/Amsterdam, Maxim 
>>>>> Sobolev  wrote:
>>>>>
>>>>>> Adrian Georgescu wrote:
>>>>>>
>>>>>>> Hello, we have released an alternative RTPProxy that works with 
>>>>>>> SER
>>>>>>> nathelper module. Is a completely new program written in Python 
>>>>>>> and
>>>>>>> should be able to run without recompilation on any system where
>>>>>>> Python is supported. We have tested Linux Debian  and Solaris 8.
>>>>>>> There are little differences against PortaOne's rtpproxy, mainly 
>>>>>>>  the
>>>>>>> problem with Xten choppy audio was solved.
>>>>>>
>>>>>>
>>>>>>
>>>>>> Interesting. I wonder what was the problem with Xten that you  
>>>>>> solved?
>>>>>>
>>>>>> -Maxim
>>>>>>
>>>>>>> Features
>>>>>>> - Compliant with SER nathelper module
>>>>>>> - Runs without recompilation on SUN Solaris
>>>>>>> - Xten audio quality is perfect  without gaps
>>>>>>> - Display active media sessions
>>>>>>> - Display traffic in minutes and kilobytes
>>>>>>> - Log to syslog the IP/port numbers and traffic statistics per  
>>>>>>> session
>>>>>>> - Flexible design for adding new features
>>>>>>> To do list
>>>>>>> - Run it on separate machine than SER
>>>>>>> - Log network traffic per domain
>>>>>>> - Integrate traffic logging with CDRtool
>>>>>>> The application is free to download and use without limitations. 
>>>>>>>  You
>>>>>>> can download it from:
>>>>>>> http://download.dns-hosting.info/RTPProxy/
>>>>>>> The application is developed and supported by AG Projects. Any
>>>>>>> feedback is welcome at support at jobserver.org
>>>>>>> Regards,
>>>>>>> Adrian Georgescu
>