[comp.dcom.telecom] Ring detection

AWalker@RED.RUTGERS.EDU (*Hobbit*) (05/07/87)

The following

              .01uF      +-------+
Line ----------||--------|AC    +|-------->
                         |       |
Line ----------||--------|AC    -|-------->
              .01uF      +-------+
              200V      Bridge rect.


will generate a voltage across the + and - of the bridge when ring voltage
appears across the line.  It will also isolate the line from your downstream
equipment.  You don't have to wait 14 weeks for a mess of diodes.

This as given may be a little *too* sensitive and trigger on small voltage
edges -- an appropriate application of R and C after the bridge can cut
this down some.

_H*
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