Questions · Intruder detection
Can a radio alarm be jammed?
It can be attempted, and that is why the standard requires radio systems to detect interference and to supervise every device. A wireless detector that stops giving signs of life has to raise an alert by itself, without anybody having to miss it.
What to ask when choosing: whether the equipment detects interference and how it reports it, how often it supervises each device, how long the batteries last and how far in advance it warns that they are running out. A well-supervised radio system is perfectly serious; one without supervision is a collection of detectors that can be down for weeks without anybody knowing.
And the underlying decision: radio solves installations where you cannot run cable —listed buildings, refurbishments, extensions on top of what is already there— and it brings a maintenance job of its own, the batteries, which has to go into the contract from day one. Where cable can be run, cable is still the most boring option and the one that gives the least trouble.
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