Originally posted by ev607797:
Man, Paul! You definitely have this stuff under control.
I like the older equipment!
Bridged ringing and grounded ringing were options when party lines were still around.
That did cross my mind. I can apply it to the 400E card: Pull the BR jumper, install TU and RG (Ringer Ground?) jumpers and the ringer relay is then tip to ground. Presumably you'd then just swap incoming tip/ring connecitons for ring-to-ground ringing.
I can't figure out anything like this on the San/Bar card though. I'm looking at the diagram from Carl's link:
https://www.kadiak.org/tel/4200a.jpg As soon as you pull the BR link, the incoming tip side of the line doesn't seem to be going anywhere except the hold circuit via relay contacts K1A.
