MDaniel called me today with an interesting question about elevator phones that I couldn't answer. Is it required that they be wired to a dedicated phone line or can they be connected to a PBX? Common sense would say no to using a PBX station because it can crash, but a stand-alone line can also go dead and it not be realized until someone needs to use it. I would imagine that this requirement varies from area to area. Does anyone have a definitive answer?
