How to increase SIP Volume Gain Levels

Does anyone know how to increase the Gains on Asterisk for all SIP calls?
I’m aware you need to create a context with the TX and RX in it but I’ve tried a few things but no success :/…I think I just need to know what context name it’s needed to be under, like (from-internal) or something else.

Thnx :slight_smile:

Look at this.

Not sure it is possible, have always defaulted to using the volume controls on the handsets or FXO gateways.