• 16 on-board zones, expansion to 256 zones(ARM801/ARM802/ARM808/ARM808-S/ARM911) • Up to 16 partitions • 8 alarm out, expansion to 64(ARM708/ARM716/ARM911) • 8 alarm keypad (ARK10C) • 2 pairs of MBus line, up to 2.4km for each bus line • TCP/IP, 2G(-G only),PSTN