Requests that the channel indicate that in-band progress is available to the user. Each channel type in Asterisk has its own way of signaling progress on the call.

; indicate progress to the calling channel, wait 5 seconds,
; and then answer the call
exten => 123,1,Progress()
exten => 123,n,Wait(5)
exten => 123,n,Answer()

See Also

Busy(), Congestion(), Ringing(), Playtones()