[Asterisk-Users] Zap (analog line) and volume

[Rich Adamson]

> my setup consists of an asterisk server with a TDM400P and a couple of 
> softphones (SJphones) ... everything works well, but the sound coming 
> from the analog line is really reaaly quiet, even though everything 
> local (echotest, voicemail, sip to sip) works fine. In fact, I have to 
> dial up the volume so high that dtmf tones are almost blasting my ear off.
> 
> Is there a way (e.g. via the configuration files) to increase the 
> overall sound level for the ZAP lines????

Yes, look in zapata.conf and find the rxgain/txgain for each channel.
Change the rxgain (or add it to the channel def's) to rxgain=3.0 to
increase the receive gain by 3.0 db.

The txgain parameter is for transmit gain _into_ the pstn (towards the
telco office). 

If you are not too far from the telco office, rxgain=0.0 and txgain=0.0
should be fine. If you are a long ways away from the telco office,
try _just_ increasing the rxgain to some greater positive value. Each
3.0db of gain is roughly equal to doubling the volume to the human ear.

When making changes to these values, always Stop and restart asterisk.
Do _not_ use the reload command as it does not reread these values.