Dear all, I'm a business owner and have had problems with our ADT alarm since it was first installed 2018, the initial problem was an AC COMMS FAIL which aledgedly means power failure, after months of calls and engineer call outs and umpteen false alarms during out of hours, i eventually asked customer services if the power failure ie AC COMMS FAIL alarm monitoring for that could it be disarmed (and they said yes to my surprise) that stopped the false alarm being triggered may i add that i was charged hundreds of pounds for engineers callouts who blamed power cuts for the issue and also blamed the back up batteries for being flat ( all of which were untrue). I've had this alarm for around 3 years now and it is not fit for purpose so between useless customer services, usless management and i mean in that they don't reply, return emails the only thing they are punctual with is their lies and their billing, so please if you value your sanity then please avoid ADT at all costs. I'm about to change to a local alarm company who can take over the monitoring of the alarm, maybe for your sanity get another company fo take over the monitoring of it.