How to detect voice on SIP call?

Question

SIP

Hello!
It is necessary to implement in python voice / pickup detection when calling via https://www.doubango.org/sipml5/ and WebRTC.
As I understand it, VAD may help. They suggested that you can monitor whether they picked up the phone, then it will probably be enough to detect an increase in the overall level when making a call.
Tell me what to read / see, or maybe you already know the implementation (python)?

Answer 1

There is a separate module for asterisk detection of AMD voice activity (Answering Machine Detection)
awsswa.livejournal.com/13340.html