• 4 alarm input ports for protection zones with detectors typed normally open or normally closed • 4 relay output ports for forced on/off, and automatic control of peripherals • 4 local analog input ports with 4mA–20mA or 0V–5V, and full scale accuracy is within 0.5% • 4 RS–485 data communication ports, each port can connect up to 20 detectors of the same type • 2 RS–232 data communication ports, can be converted to RS-485 • 4-channel 720P or 2-channel 1080P digital video access, OSD overlay supported • 1-channel two-way audio • 1 10/100 Mbps self-adaptive RJ–45 network ports with switch function • Support 1 built-in 2.5-inch SATA hard disk drives with max. 10T capacity each for video storage • Data and video upload with TCP/IP • OSD overlay on videos with up to 8 lines of information and max. 16 characters for each line. Color is adjustable for different information types • Snapshot linkage for alarm events • Record max. 50,000 logs with specific time including alarm events, telemetering data, and operation logs • Device remote access, query, peripheral configurations, and configuration wizard on web manager • Power supply by +12V DC, or 12–48V DC