[Asterisk-Users] Ringdown Circuit Configuration

[Don Pobanz]

We have need of a ringdown circuit in an elevator. If someone picks up 
the phone, it should dial another extension without any keys being 
pressed. (There are no keys on the phone)

If it was an incoming call to asterisk, the following lines in 
extensions.conf would do the trick.
exten => s,1,Answer
exten => s,2,Dial,Zap/10

However, the 's' state is not valid for just picking up a phone 
(extension). With nothing being dialed there are no extension matches 
to make. It is like the dial tone needs to time out in a very short 
time and instead of getting the busy tone, asterisk should dial an 
extension.

Anyway, I have not figured it out. Suggestions?

Don Pobanz