asterisk users - Apr 2006 - Asterisk Voice Problems

Hi, 

I am running Asterisk 1.2.1 using Digium TDM 400P with 4FXO lines 
to connect to the PSTN world. But, I constantly get clipped voice whenever 
there is a call placed using Zap channels. 
I have tried it all the recommended solutions 
- turned off all non essential services on the machine 
- ran fxotune 
- Changed IRQ settings
But nothing works. 
The only thing that works is reducing the rxgain to around -20. But 
this leads to other issues like the hangup on the PSTN line is not detected 
by Asterisk. 
Anyone have a clue about how to fix the bad quality problem. Any 
help will be highly appreciated. 

Thanks, 
Shyam

Hi,

Have you try to install this TDM400P card on another asterisk server? Same
problems? 

Regards,
Kevin 

-----Original Message-----
From: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Shyam Gopale
Sent: Thursday, April 27, 2006 5:07 PM
To: asterisk-users@lists.digium.com
Subject: [Asterisk-Users] Asterisk Voice Problems

Hi, 

I am running Asterisk 1.2.1 using Digium TDM 400P with 4FXO lines to connect
to the PSTN world. But, I constantly get clipped voice whenever there is a
call placed using Zap channels. 
I have tried it all the recommended solutions
- turned off all non essential services on the machine
- ran fxotune
- Changed IRQ settings
But nothing works. 
The only thing that works is reducing the rxgain to around -20. But this
leads to other issues like the hangup on the PSTN line is not detected by
Asterisk. 
Anyone have a clue about how to fix the bad quality problem. Any help will
be highly appreciated. 

Thanks,
Shyam
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