Alarm box 1,RS485 and RS232 interface 2,Compatible with many protocolas:Unsight,Hikvision,Myteh etc. 3, ... , DVR software, embedded DVR or matrix engine through RS485 or RS232 bus, then according to the customer's parameter setting active ... to turn on the light or alarm, transfer speed dome camera's presets,linkage electron map, shoot the picture by linkage ...