Telephone line announcer?

We bought a telephone exhange system for our business, which directs calls to different extensions based on what key the caller presses on their phone. We want one of the extensions to play a prerecorded message when a call is directed to it - how an answering machine plays an outgoing message, but without recording an incoming message. I have looked online and have only found large, expensive units. All we want is a small, inexpensive box that will immediately play the prerecorded message when a call is directed to it. Does anyone know where I might find something like this?

There is typically a module for a PBX that will handle announcements. Aside from that, you might want to check attendant types in your voice mail system. Chances are, you can make an announcement that way.

I would suggest you contact the manufacturer of your PBX (private-branch exchange - your phone switch/exchange system) or the distributor from which you bought it and ask what you need for an announcement module.