Troubleshooting help for home and business alarm systems

Why an alarm panel reports a communication failure, from cancelled landlines and VoIP to retired 3G cellular radios, and what to ask your monitoring company.

From someone who worked in a central station: why each person needs their own passcode, how to choose keyholders, when police or fire get dispatched, and why the station will not ignore repeat alarms.

The real reasons alarms go off on their own: misaligned door contacts, motion detectors and pets, heat and drafts, low batteries, and entry delays, and how to track down the zone responsible.

Avoid false dispatches and fees: how to put a monitored alarm on test with the central station, what to tell them, and how to confirm signals afterwards.

Step-by-step: finding the right 12-volt sealed lead-acid battery, swapping it safely without setting off the siren, and how long the low-battery warning takes to clear.

How to identify the panel, get the codes, find out whether it is locked to the previous owner's alarm company, and decide whether to reactivate, self-monitor, or replace it.