[Asterisk-Users] Problems with the FXS module in a TDMxxx card (no sound when receiving a call)

[Dan]

Hi all,

I have a brand new TDMxxx card with 3 FXO modules and one FXS.
It has replaced my old 3 X100P cards.
The FXO part work as before, after some adjustments in the rxgain/txgain 
part.

The problem I have is with the FXS module.
I can place calls to SIP/IAX or PSTN destinations without any problems, but
the sound received by the other part is much to strong and a little bit 
distorted.
I have tried to modify the txgain up to txgain=-20, but still too strong.
..and this is not all.
When I receive a call, from any type of source (IAX,SIP or PSTN), there is
no sound (at both ends). No errors in the Asterisk console.

I have tried to search through the archive but ... nothing related to 
this....
There is any way to enable something like 'iax2 debug' but for Zaptel 
channel?

Any suggestions are welcome.

Thank you and best regards,
Dan