UL634 Standard – Level 1 and Level 2
High Security – ICD / ICS 705
UL634 is the standard for all switches and connectors used in alarm systems. The 9th edition (2007) eliminated the previous BMS high security categories. Learn about the difference between High Security Levels 1 & 2. The ICD 705, sets the standards for SCIF intrusion detection systems for the government Intelligence Community, and states a clear reference for Level 2 devices.