What do these zones mean and what are advantages of having zones?


Alarms will malfunction sometimes. Have false alarms. It is easier to track
down the problem if sensors are on different zones. The alarm company will
get a code which says which zone tripped.

Also fire sensors are on a different zone. When the signal is sent, the
alarm company can tell if it is fire, burglary, etc. Some have medical
alerts on a separate zone. Also they can detect a burglar moving around in a
building if sensors are on many zones. A door trips, then a motion sensor,
then an interior door, etc. An alarm system can send multiple alarms as
sensors are tripped.

Also wireless is cheaper to install, but the batteries can cost a small
fortune over many years. Might be less expensive over the long run to
install a wired system.