[asterisk-users] Increasing voice volume without getting echo or entered digit problem

[Valer Nur]

Hi Bilal,

High volume is always a big for echo cancellation. The problem is that the signal reaches saturation and therefore reduce the effectiveness of the detection/convergence.  If your existing echo cancellation can not handle it, you might want to try a different algorithm for echo cancellation. Try the PBXMate to see it resolves the problem in your case.


Regards,
Valer


________________________________
 From: bilal ghayyad <bilmar_gh at yahoo.com>
To: asterisk-users at lists.digium.com 
Sent: Thursday, May 10, 2012 2:11 PM
Subject: [asterisk-users] Increasing voice volume without getting echo or entered digit problem
 
Dears;

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.

Regards
Bilal

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