asterisk users - Sep 2005 - Wait for dialtone

Is it possible after dialling a trunk prefix to wait for dialtone (or wait 2
seconds) before continuing to dial the outgoing number ?
 
I need to "hunt" for one of several lines, and when one successfully
provides dialtone, to continue dialling.. 
 
A simple NO will do, but if there's a workaround, I have not found it. 
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
http://lists.digium.com/pipermail/asterisk-users/attachments/20050909/4a90f97e/attachment.htm

> Is it possible after dialling a trunk prefix to wait for dialtone (or wait
2 seconds) before
continuing to dial the outgoing number ?
>  
> I need to "hunt" for one of several lines, and when one
successfully provides dialtone, to
continue dialling.. 
>  
> A simple NO will do, but if there's a workaround, I have not found it. 
I don't believe there is any dialtone detection support in * today.

You can add a "w" in the dial statement for analog zap ports to insert
a delay, but that delay does not involve listening for anything.

Each "w" adds about 1/4 second or so, something like this:

exten => _9XXXXXXX,1,Dial(Zap/4/ww${EXTEN})