[Asterisk-Users] Advanced queueing

[Gavin Hamill]

Hullo :)

Please be gentle with me, I don't have a working * install, and am just 
looking for background information.

I'm always impressed by companies who implement a queue like "You are now 
number N in the queue. There are currently M agents answering calls, and your 
call should be answered in approx. O minutes"

I've seen on 
http://www.voip-info.org/tiki-index.php?page=Asterisk+sound+files+additional
that Allison has recorded soundfiles to support this style of queue, but how 
do I make use of them in Asterisk?

Is there a pre-written application to implement this type of queue, or would 
it need to be an AGI-based affair?

Cheers,
Gavin.