Stan wrote:
Hey everyone!

About the cheapest way to generate a ring-voltage problem...

I've seen several "call directors", a box that picks up a ringing line,
listens, determines if it's an incoming fax or modem, then sends the
signal to the corresponding RJ-11 jack where the actual device is
plugged in.

Wouldn't one of these have to generate a ring voltage to get the fax or
modem to go off-hook?

Anyone have a schematic for one of these? It might be a rather simple
thing to modify one of these for the OP's purpose.

Comments?

Stan.
Hmmm,
Digitally there is distinct ring service from Telco. Corresponding
device responds when phone rings. Even single line can have different
multitple numbers, etc. Talk to Telco rep. and express your service needs.