There are many security professional philosophies regarding intrusion protection, particularly when these discussions address levels of protection, all agree that the the ideal intrusion system provides layers of protection. This ideal situation would include:
WIRELESS TECHNOLOGY
Complete perimeter protection
Second layer of defense-complete interior protection
Audible and visable notification devices: loud siren-strobes
All mounted devices properly tampered
24/7 UL monitoring services
Back-up cellular communication support for land line communicators