Clicking noise on TDM400P

"Aaron Seelye" <aseelye-listseltopia.com>
> I have a TDM400P with 4 FXO ports, currently using one.
 When sending or 
> receiving calls on this card, there is a nearly
constant popping/clicking 
> sound, which some digging said it was 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 jack, 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'm running the latest
zaptel and asterisk btw.

I have the same problem, though it is more noticeable on my
FXS port (but I 
haven't done much testing of the FXO, largely because I
don't want to use 
the TDM for "real" calls until I have resolved
the problem).

>From research I've done on Google, etc I'd put it down
to a problem with 
interrupts not being serviced fast enough, causing dropouts
- however it 
would be odd, in that case, that your X100P (as mentioned in
your second 
post) doesn't see the same problem.

-- 
Thomas Sandford 


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