I am running an OpenVox GSM gateway using Asterisk 22.214.171.124. It is a firmware that can’t be upgraded. I have tried setting rxgain and txgain there, but it crashes the system and it fails to do anything till that is removed. I remember trying to set the gains on a Asterisk 11 server before upgrading to 13 and don’t remember achieving much success, but maybe I should try again.
I am now running Asterisk 13 on a Dell server that ties into the GSM gateway using SIP to receive incoming calls. I have it recording and then playing back audio from the users, but it often cuts out too soon, unless I am speaking unnaturally loud.
exten => s,n,Record(/var/lib/asterisk/sounds/outboundmsgs/temp_recording:wav,4,25)
Is there a good way to adjust the thresholds for silence detection for the Record() application like there is for AMD?