[Asterisk-Users] RE: Caller ID

[Gavin Hamill]

On Monday 03 May 2004 00:02, Paul Crick wrote:

> Hmm.. reading up, you could probably get away with just monitoring for the
> alert tone then? 

And this time round, I actually read your message.

Yes, you're quite right - it might only be a tiny 'bleep' on the line, but if 
the line is currently not in use, and * is the only thing connected to the 
line, actually it must be safe to assume that a momentary sound at the alert 
tone frequency is the announcement for CLID incoming, and hence an incoming 
call!

Cheers,
Gavin.