On Tuesday, February 13, 1996 3:00:00 AM UTC-5, James W. Lynch wrote:
> Does anyone have plans for a simple off-hook detector? I need to know
> when someone has lifted a receiver. A dial-tone detector circuit would
> also work.
> Any suggestions?
Did all Telephone exchange Inc. companie have that off hook tone that was a medium pitch sound that went like a horn? Was it a siren or a buzzer?