asterisk users - Jan 2004 - Using ACD functionality for main number answer and "music on hold"

I'm considering using the Agent "login/logoff" function to add to
a queue
that will be our "main number during the day" to answer.  Periodically
our receptionist is not at her desk and would be useful for her to 
login elsewhere and get the main number calls to transfer as she sees 
fit.  If the agent's don't pick up in a specific amount of time,
it's
transferred to our main IVR...

I have the functionality working, but right now when you dial the main
number you get the "musiconhold" that is defined for that queue.  Is
there a way (short of recording a "mp3" of a ringing phone) for the
person
to get a ringing sound instead of the MOH?

Thanks,
Lenny