Add an option to pick up and play fax handshake on blocked calls

[lucienve]

This may be of some use in reducing repeat calls, if the robocaller removes fax machines. This could either be done by playing back a .wav sample of the tones, or possibly sending the correct commands to the modem to do so itself.

[drinckes]

The configuration file has the option BLOCKED_GREETING_FILE that you can use to select what sound to play to blocked calls:

[Configuration]
  BLOCKED_ACTIONS = ('greeting',)
  BLOCKED_GREETING_FILE = resources/blocked_greeting.wav

Does that do what you want?