"Dave Plowman (News)"wrote


Two of the wires form an anti-tamper (24hr) circuit. Depending on how
sophisticated your system is, shorting those should stop it sounding when
the wire is cut. But you'd need to know which colours were used for this.
Which would mean opening up the main panel. You'd need the installation
instructions for that to know how to prevent it reacting to being tampered
with.

Most modern bell boxes need a hold-off supply to stop them sounding.
This is why bell boxes sound when there's a power cut (internal panel
battery not replaced regularly....therefore loss of mains = total loss of
power to panel = loss of hold-off signal).

Phil