Thanks. On a related note. The problem that I am troubleshooting has to do with an IAX connection to TELIAX. Outgoing calls are perfect. When I have incoming calls they are very crackly and break up. I have checked the jitter buffer and it is not overrunning so it doesn't appear to be a jitter or packet loss problem.
I am beginning to suspect that since I don't have a ZAPtel card in my
machine, * is losing sync with the incoming stream. From what I understand,
if there isn't a zap timing source * uses the incoming data stream to derive
timing.
I have been watching the to and fro of this over the last day or so and being a fairly newbie myself, Just looking plainly at what you have running, You have a SMP kernel running on a Dual Capable server but with only 1 cpu.
Why Don't you run a NONE SMP kernel, one which would be suited to the fact that you only have one CPU in the server.
Then the other thing if mem serves me you are running 2.6 kernel so why not run ztdummy? With the 2.6 kernel this does not require any specialist Hardware or anything!
I have * running on Mandrake 10.1 and I to had similar problems in the begging but as soon as I had ztdummy configured correctly everything seemed to just fall into place and work with IAX and *, not that I have got a perfect dialplan as that confuse's me but hey thats another subject.
David
Since the incoming stream is using VAD, my assumption is that it is losing the timing during the pauses in the speech. Does anyone know of a way to just turn off VAD in *? This would have multiple benefits (if you have the bandwidth). Turning off VAD will improve voice quality by eliminating and front end clipping during talk spurts and I am assuming will also minimize the impact of not having a ZAP timing source.
Is there a way to disable VAD in *?
Thanks again.
-----Original Message-----
From: Martin List-Petersen [mailto:[EMAIL PROTECTED] Sent: Saturday, December 18, 2004 8:20 PM
To: Keith O'Brien
Cc: [EMAIL PROTECTED]
Subject: Re: [Asterisk-Users] Re: Asterisk Crackly Bad quality
Citat Keith O'Brien <[EMAIL PROTECTED]>:
The URL you are looking for is:
http://www.voip-info.org/wiki-Asterisk+timer
Thanks. After reading through the notes I checked my server (Dell 1750) and noted that it uses a USB OHCI interface so the first option doesn't appear to be an option. Also it indicates that the second option of using
zaprtc
<http://www.voip-info.org/wiki-Asterisk+zaprtc> won't work on SMP
systems.
The 1750 is a SMP system and I am running a 2.4 SMP kernel but do not actually have a second processor installed. Can I still use zaprtc with
a
SMP kernel if the second processor isn't actually installed??
zaprtc should work indeed if you only have one CPU in the system.
Sl�n Leat, Martin List-Petersen Dublin, Eire (contact info ==> http://www.marlow.dk) -- We Klingons believe as you do -- the sick should die. Only the strong should live. -- Kras, "Friday's Child", stardate 3497.2
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