🚀 go-pugleaf

In article <879275926snz129.os2.7@nospam.demon.co.uk>
           {R}reply@nospam.demon.co.uk "Richard Ashton" writes:

> The ringing current is presented on the A leg, travels through the
> capacitor and out on the third wire, along this third wire all the
> bells of an extension set are wired in series, until the last
> extension when the "out" side of the bell is connected to the B leg.

In today's modular world, each socket has a third wire, conveniently 
delivered on pin 3, and also a B leg on pin 5 of every jack and all 
the bells are wired in parallel.  If they were in series, unplugging 
any phone would stop all the phones ringing, so modular systems must 
be parallel systems.

> if the A and B are crossed over the "out" side could be back to the A
> leg, hence no ringing :)

That's still true.  And worse, it can result in two phones ringing 
continuously with their two bells placed in series straight across A 
and B and with no capacitor in that circuit.

Regards,
-- 
   Tony - G3SKR / W2TG                   email: tgold@panix.com