We're currently under a monitoring and service contract with ADT, but I was wondering if it's possible to add devices that aren't supplied by ADT. I'd like to add a pet-immune motion, another wireless motion, a CO detector and a second keypad in the master bedroom -- but the prices they're quoting me are pretty insane.
I believe the system is a VISTA 20P.
The two supposedly-pet-friendly wireless motions (IR, I think) we have now are mostly OK, but have falsed twice because of our four rambunctios cats charging through the house at 5am when we're away from home on vacation. Another false alarm and we lose police response for 1 year and could face a court summons. The two techs ADT sent out were useless.