Name
WaitForRing() — Waits the specified number of seconds for a
ring
Synopsis
WaitForRing(timeout)
Waits at least timeout seconds
after the next ring has completed.
; wait five seconds for a ring, and then send some DTMF digits
exten => 123,1,Answer()
exten => 123,2,WaitForRing(5)
exten => 123,3,SendDTMF(1234)