I like the PM45 especially the App and the fact you can remotely dial in through the unit without a phone line. It would be good if it still had the option of a phone line back up but that's not to bad I guess, another good thing is the end user app being able to arm and disarm remotely, it's pretty handy for clients when they get a call saying the staff haven't armed the system.
I've used the direct wireless DTU units and they aren't to bad either but as far as I know there is no app or software, the unit can be remotely switched to PSTN for remote access.
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