In article ,
Andrew Gabriel wrote:
You can't simply swap them. The jack plugs run the phone bells in
series, and you'll need to change the circuitry for parallel phone
operation,

The strange thing is they don't. On that plan the bells were in parallel -
otherwise you'd have needed some form of switch when one was unplugged.

I've got the original wiring diagram of both the installation and phone
strapping if you'd like a copy.

--
*Change is inevitable ... except from vending machines *

Dave Plowman London SW
To e-mail, change noise into sound.