[Asterisk-Users] one way choppy sound problem !

[Dawid Mielnik]

Michael,

The PSTN cards and the network card are not sharing an interrupt, the PSTN
interface is sharing an interrupt with an audio controller and an smbus, the
network card is not sharing an IRQ with anything though.

Best regards,

Dave


-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com]On Behalf Of Michael Van
Donselaar
Sent: Monday, January 05, 2004 4:55 PM
To: asterisk-users at lists.digium.com
Subject: Re: [Asterisk-Users] one way choppy sound problem !


On Mon, 5 Jan 2004 13:29:06 +0100, "Dawid Mielnik"
<D.Mielnik at elka.pw.edu.pl>
wrote:

>
>Hi Again,
>
>Apart from X-lite client I have also tried eStara, diax phone, iaxcomm and
>some others. I have tried different codecs - GSM, aLAW uLAW. They all give
>the same result. In the direction PSTN user ---> Softphone user the sound
is
>crystal clear (also tried on a dial-up connection), in the other direction
>however the sound is a bit choppy. The chops occur at regular intervals of
>time, at about 1-2 seconds !?

Are the PSTN interface and a network card sharing an interrupt?  I had
similar
problems with my X100P and a thunderlan dual ethernet card shring IRQs (also
would make one of the ethernet ports fails until reboot)

Are you still using the P133?  I tried using a P120, but it wouldn't do the
trick with GSM conversion.  DIAX and iaxComm, since they use the iaxclient
library, need to use GSM.
>
>When analyzing *'s ethernet interface with tcpdump (raw tcpdump -i eth0) I
>have noticed that the scrolling slows down during the times when chops
occur
>in the sound.
>
>I have tested things using different softphones and different internet
>connections (user side) - always yelding the same result. In other words
>this is probably a problem on asterisk, either the hardware (ehternet
>interface/E100p) or a swoftware bug, incoming RTP buffering maybe ?
>
>Has anyone actually obtained a good quality sound in a similar setup ?
>
> 	  Internet           2 x E1
> x-lite <-------> Asterisk -------> PSTN
>
>
>Any help appreciated !
>
>Best regards,
>
>Dave
>
>
>-----Original Message-----
>From: asterisk-users-admin at lists.digium.com
>[mailto:asterisk-users-admin at lists.digium.com]On Behalf Of Nicolas
>Gudino
>Sent: Friday, January 02, 2004 6:35 PM
>To: asterisk-users at lists.digium.com
>Subject: Re: [Asterisk-Users] one way choppy sound problem !
>
>
>I have a similar problem, with GS phones, X-Lite or Kphone. I tried all
>the codecs with the same result. Choppy sound in the direction SIP-Phone
>-> pstn, but crystal clear sound the other way around. The only
>difference in my case is that I have two asterisks servers connected
>together via IAX2, the PSTN call is received in one asterisk, while the
>sip phones are in the other asterisk. Ex:
>
>pstn -> * --iax2--> * ->sip phone (GS, Xlite or Kphone)
>
>If I use an Xlite in the same asterisk as the pstn line, the sound is
>perfect in both ways. But when I answer the call in the second asterisk,
>the sound from the sip phone to pstn is choppy, with or without silence
>detection, and the sound from pstn to sip phone is perfect.
>
>The asterisk server with the pstn line is an old pentium 133, maybe
>thats the problem, I will try with a better machine and see how it goes.
>
>
>On Fri, 2004-01-02 at 06:23, Dawid Mielnik wrote:
>> Hi all,
>>
>> I have my asterisk setup as following:
>>
>> 	    IP               2 x E1
>> x-lite <-------> Asterisk -------> PSTN
>>
>>
>> When I place a call from x-lite to PSTN, the quality of the sound in the
>> direction x-lite -> PSTN is very bad. That is, the voice of the x-lite
>user,
>> heard by the PSTN user is choppy and makes communication not very
>pleasant.
>> The sound is choppy as if bits of data were lost. The strange thing is
>that
>> the x-lite user hears the PSTN user fine !
>>
>> In x-lite, I have swithed off sience detection (transmit silence - yes),
>> this has improved the sound quality but did not eliminated the problem. I

>> have fed a countinious sound into the microphone and still got chops in
>the
>> sound. I have also tried changing the codecs gsm, alaw, ulaw - but I get
>the
>> same problem with all of them. Maybe the problem lies somewhere in audio
>> buffering settings on x-lite ?
>>
>> Has anyone ever had this sort of problem and managed to deal with it ? I
>> would greatly appreciate your help !
>>
>> Best regards,
>>
>> Dave
>>
>>
>> _______________________________________________
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>> Asterisk-Users at lists.digium.com
>> http://lists.digium.com/mailman/listinfo/asterisk-users
>>
>
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