[Asterisk-Users] Echo calibration with ztmonitor and a test line from a telco

[Ken Dresdell]

Hello everyone,

Does anyone have experience with echo calibration for TDM card with
rxgain and txgain (Zapata.conf) and ztmonitor (CVS Head)? 

I have found very few information about it and what I have found makes
me confused. I have a phone number provided by my TelCo(1004 hz at 0db)
and from what I saw, I am supposed to calibrate my rxgain to get a 14800
value with ztmonitor . 

Here is the information I found:

 
http://lists.digium.com/pipermail/asterisk-users/2004-November/071301.ht
ml


Does anyone have successfully reduced echo with this procedure?

My main problem is that when I get 14800 with ztmonitor, I have now a
rxgain=14 and it seem to be too high for asterisk and I cannot dial out
anymore.

Any suggestions?


Thanks in advance for your pointers

Regards

Ken