Not in the PBX. You can schedule database events etc. in OpsMGR, but nothing like you're wanting. This sounds like an application well-suited for a PC to autodial a specific page group on a schedule and play a .wav file. This in fact should be very easy to do and could even happen at very precise times, since the PC can be time-synched with NBS, etc.
Original MUG/NAMU Charter Member