WayneW
Senior Member
The diodes are attempting to convert the AC ringing voltage to a DC voltage that the ringer will ignore. But without some filtering capacitors, there is still a waveform there, so I don't know what modern ringers will do with that. I also don't know if the phone company likes diodes on their line. Maybe electronic ringers are voltage sensitive and don't care if it is AC or DC or something in between anymore? YMMV?
I assume the ringer would have to be before the polarity protection circuit, otherwise the ringer will be getting something other than the desired pure AC ringing signal.
I assume the ringer would have to be before the polarity protection circuit, otherwise the ringer will be getting something other than the desired pure AC ringing signal.