Asterisk: The Future of Telephony, 2nd Edition

Name

Congestion() — Indicates congestion on the channel

Synopsis

Congestion([timeout])

Requests that the channel indicate congestion and then waits for the user to hang up or for the optional timeout (in seconds) to expire.

This application signals congestion only to the far end; it doesn’t actually play a congestion tone to the user. Use Playtones(congestion) to play a congestion tone to the caller.

Warning

If you use this command without a timeout, you run the risk of having a channel get stuck in this state. This is not really needed when you want to indicate congestion to a user. Just use Playtones(congestion) so they hear the fast-busy, and then Hangup().

Always exits abnormally:

; if the Caller ID number is 555-1234, always play congestion
exten => 123,1,GotoIf($[${CALLERID(num)} = 5551234]?5:2)
exten => 123,2,Playtones(congestion)
exten => 123,3,Congestion(3)
exten => 123,4,Hangup()
exten => 123,5,Dial(Zap/1)

See Also

Busy(), Progress(), Playtones(), Hangup()