Does anyone know where I can get a wiring diagram for a Dukane system? It is dated 1986. My problem is in one of the patient's room. Re-set/cancel doesn't work. I have 2 different replacements, neither match the old call station, but are supposed to work. They have the 1/4" pin hole and a cancel button. I am not well experienced in this type of low voltage system. There was no type of schematic with either device. Thanks for any help.