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No, no siren would go off. However, the system does communicate to ADT monitoring when the alarm is initially tripped, and again when the correct code is entered to disarm (sends a CANCEL signal to ADT). So, if the second signal to disarm is never received, ADT monitoring will call you and then dispatch police if you don't tell them it's all clear. In this way, I believe, even if the intruder quickly smashed in the control unit, it'd be too late as ADT would already be counting down for the disarm code.
Sorry, there was a problem. Please try again later.Yes. There is an internal siren, the unit has a backup battery and if you pay for ADT monitoring, there is a cellular backup to your WiFi so if they unplug your router, ADT will still be informed. There are also Z-Wave alarms you can connect to the hub to have additional alarms sound if intrusion is detected. They will turn off once the hub tell them to, so if the unit is smashed prior to the "all clear" signal, they will still sound.
Sorry, there was a problem. Please try again later.If it is monitored it would still be fine but if they broke it, the siren would stop as it is attached to the hub. You would have already been alerted so it wouldn't be too much of an issue. The alarm goes off instantly, so there is no 30 second buffer or anything.
Sorry, there was a problem. Please try again later.the alarm is on the base station
Sorry, there was a problem. Please try again later.Sort of. The unit has a backup battery attached to it, so it will continue to sound unless the burglar breaks it or removes the battery (semi-difficult)
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