Thank you for your information. Are you not concerned about criminals using signal jammers to make the alarm useless?
The MG5050 also have 5 hard wired zones on board (zone 1 to 5) - my perimeter is protected by outdoor wireless pir's and for indoors I have hardwired pir's (which are part of my original system).
I purchased the new system to use the outdoor pir's for early warning/detection and have them armed virtually most of the time. The only time they are not armed is if we spend some time outdoors (then only the area we are in is de-activated). For example when we are around the lapa/pool area, the pir's covering the front garden and sides of the property is armed - only the pool/lapa area is not active.
In essence I run two stand alone systems on my property (both paradox) - one indoors with hardwired sensors and the new one with wireless pir's for perimeter security/early detection.
I am also not sure how easy it is to jam the signals - found this thread on the subject, it is a a bit old: