[asterisk-users] TDM400P FXO click sounds

[Matthew Fredrickson]

ggonzalez at telviso.com.ar wrote:
> Hello,
>  
> I have a TDM400P with 4 FXO ports, currently using three.  When sending or 
> receiving calls on this card, there is a nearly constant 
> popping/clicking sound, it is related to the 
> echo cancellation?.  I adjusted my gains properly, but to no avail.  I 
> even found that setting echotraining=no in zapata.conf didn't change the 
> scenario at all.  I've plugged analog handsets into the same jacks, and 
> the line is crystal-clear. Below is my zapata.conf, if you guys have any 
> ideas how I might resolve this, I'd appreciate it.  I have installed from
> sources Asterisk 1.2.22 and zaptel-1.2.19 on a debian etch x86_64.

Have you tried running fxotune on it?  If you have (or haven't) make 
sure you try the zaptel-1.4 version of fxotune.  It has improved 
significantly since 1.2.

-- 
Matthew Fredrickson
Software/Firmware Engineer
Digium, Inc.