[Asterisk-Users] making wakeup feature call phone number, not extension?

[Roger Hanson]

How would one go about setting up the wakeup feature of Asterisk to NOT 
call an extension, but to call a phone number?

My setup works great for wakeup on local extensions, but I'd like to set 
it up to call external phone numbers automatically and play a specific 
sound file (to remind people of upcoming hair stylist appointments). 

I suppose either there'd have to be a web interface to use for this 
(entering a time for the reminder - and a phone number to call) or 
change the voice prompt to ask for a phone number to use, if not the 
extension called from.

I'm sure it's doable - but I am now knowledgeable enough.  I searched 
and didn't find any instructions on the web for something like this.

Thanks for any help...