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555 pbx board
Posted by John on June 23, 2012, 3:32 am
I hope it's ok to post on this board since I didn't sign up or anything. I have a couple of 555 pbx boards in my computer room at home and would like to find out more about how to connect the power. I have one of them working for phone to phone calls but had to stick a piece of paper in one of the relays on the telephone set group to be able to hear. I have 24 or 48 volt supply and ringing inverter running on 24 volts and connected to the block but may be missing something email email@example.com
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