Thanks for this really helpful post. I appreciate the explanation too.
This makes much more sense now so thanks again.
I'm moving house soon, and there is already a wired system in, so I I can get that services and it is working ok, I think I will use that instead!
Sorry for another basic question, but would a two way alarm communication between panel and accessories confirming system armed?
Can't give 'kudos' on my Mobile for some reason, but will do when on a PC!