Is it possible to make Asterisk jump into action and play a sound file as soon as a handset is lifted, instead of providing a Dial Tone and waiting for the user to dial an extension.

With analog phones (chan_dahdi) – you just have to set ‘immediate = yes’ in chan_dahdi.conf , with a SIP phone: that’s something to configure the handset for, as it only sends out a call once you “dialed”.

Thanks to: Tzafrir Cohen