My school, renovated in 2001, used to have a Simplex PA system. I have been trying to find information about it, and was wondering if you guys could identify the system based on the following characteristics (as I do not have any recordings):
- The bell was an A (440hz) lasting for 5 seconds.
- The all-call tone was a single chime (might have been an E)
- The room call tone was two chimes in quick succession (like a doorbell).
I would get recordings, but it has since been replaced by a Valcom system with similar tones. Does anyone know what system this could be?