Gvoice
From Yate Documentation
Google Voice support module
This module watches for incoming calls from Google Voice and sends DTMF upon answer. This is to satisfy GV's prompt for a DTMF "1" to acknowledge answering of the call.
The defaults listed below should work in most cases.
[general] ; Global settings for the Google Voice(TM) support module ; call.execute: int: Priority of the call.execute message handler ;call.execute=20 ; call.answered: int: Priority of the call.answered message handler ;call.answered=50 ; chan.hangup: int: Priority of the chan.hangup message handler ;chan.hangup=50 ; dtmf_delay: int: Delay until first DTMF is sent, in seconds ;dtmf_delay=2 ; dtmf_outbound: boolean: Send the DTMF to the outbound instead of inbound ;dtmf_outbound=no ; dtmf_text: string: Sequence of DTMFs to send, one per second ;dtmf_text=1 ; match_param: string: Parameter to match in call.execute message ;match_param=calleruri ; match_rule: regexp: Regular expression to match the message parameter ;match_rule=^jingle:.*@voice.google.com/