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View Full Version : How do you wire two phone hand sets with a 9 volt batt. For wire tracing


kevwayd
Jun 24, 2011, 07:43 AM
I have 2 phone handsets that I want to wire up for communicating on electrical wiring for tracing purposes. I built a set about 20 years ago but I do not remember how to wire them now. I know there is a 9 volt battery and a toggle switch.