Sorry, but you are wrong. The ring wire was
solely there to feed the 75V AC ring signal to old phones which required it to drive old-fashioned bells in the old style phones. The ring wire (#3) is fed from the A wire (#2) via a 2mF capacitor in the master socket - this capacitor passes the ring signal, but blocks the 50V DC. Unfortunately the ring capacitor also passes any HF signals floating around, including strong MW radio signals picked up by the relatively high-impedance ring wire, which are passed back through to the A wire via the ring capacitor. Placing a short across the ring wire would have no effect because it would be blocked by the ring capacitor.
If your theory was correct, then phones would not work at all if the ring wire was didconnected, and they all do. Even the old ones will still work - they just don't ring. Fortunately most modern phones don't need the 75V AC signal, but it's wise to check after you've disconnected the ring wire. There's nothing to stop you cutting the ring wire at each socket - you're just giving yourself more work to do, with little or nothing to gain.
Edited by deleted (Sun 22-Oct-06 10:42:25)