... Operation System: Real Time Operation System(RTOS)6.HDD interface: 2 SATA interfaces,support 48bit LBA working mode7.Alarm ... output (delay opened circuit, relay output)8.I/O interface: RS485 interface supports network transparent channel connection and serial port control ... control, PS/2 mouse, serial port control keyboard10.Backup interface: support data backup function11.Network port: RJ 45 10M/ ...