FW: [Asterisk-Users] one way choppy sound problem !

[Asterisk]

Hello list,

I've been experiencing choppy sound as well.

The version on Asterisk I was using originally was dated 10/24/03 (I
think), the problem appeared after I updated from that version.

My setup is a little different though. I'm having choppy sound only on
some incoming calls -- from PSTN->PBX (between spans on a TE410) and
PSTN->SIP.

We use Cisco 7940 handsets and we also bridge calls to our existing PBX.

We don't have any trouble with outgoing calls. If a caller tells us we
"sound like we're on a mobile phone that's breaking up", we call them
back and everything is fine.

I've kept rebuilding libpri, zaptel and asterisk on a regular basis, but
it hasn't gone away.

We do have an IRQ problem, I saw someone mention that, so I'll take a
harder look at that problem and see if it solves it.

I though I'd throw this in, because we notice the choppiness when
bridging PSTN->PBX, not just PSTN->SIP.

Regards,
Ben
________________________
Benjamin Wakefield
ben at team.dcsi.net.au
http://www.dcsi.net.au/
DCSI - We do Internet.
64 Queen Street
Warragul, VIC 3820 AU
Ph: (+61) 1300 665 575
Fx: (+61) 1300 556 595

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-----Original Message-----
From: Dawid Mielnik [mailto:D.Mielnik at elka.pw.edu.pl] 
Posted At: Friday, 2 January 2004 8:24 PM
Posted To: Asterisk
Conversation: [Asterisk-Users] one way choppy sound problem !
Subject: [Asterisk-Users] one way choppy sound problem !


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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