How I can increase the voice volume in the analogue line (at dahdi port) without getting a problems in the entered digits (when using Background function)?
I got to know previously that it is possible to increase the gain at hardware and not software, this is better to avoid getting a problems. But where? I am using DAHDI 2.4 and another machine has DAHDI 2.6
Using txgain and rxgain from chan_dahdi.conf will not help, it will increase the voice volume but with the following problems:
1) Suddenly the call will be disconnected while we are talking.
2) When calling the Asterisk box and we entered the digits, it is failing to collect it (sometime does not collect it correctly and sometime it collects the digit duplicated).
3) Echo problem.
So I need to know how to increase the voice volume from another place?
Appreciate the kindly help.