[Asterisk-Users] one way choppy sound problem !

[Nicolas Gudino]

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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