The DS-7700 Series NVR contain a unique PoE (Power over Ethernet) system with 16 independent Poe network interfaces. Also featured in this NVR is a ‘Plug & Play’ feature that utilises only one cable for both data and power needs, drastically reducing time and simplifying the overall installation process.   The local recording and network transmission uses H.264 compression that provides good image quality with relatively small bandwidth and disk space consumption. There is place for four SATA HDDs with total capacity up to 16 TB. In addition, the NVR supports NAS (NFS) and SAN (iSCSI)disk arrays. The option of automatic overwriting of existing material prevents loss of the current data. Built-in USB ports can be used for connecting USB storage devices, usually to copy some data.    Features:   This Recording Unit has the following high level functions:•Up to 16-ch IP cameras input•Third-party network cameras supported Up to 5MP resolution recording•HDMI and VGA output at up to 1920•1080P resolution•Plug & Play with 16 independent PoE network interfaces•4/8 SATA HDD interface up to 4TB each•HDD quota and group management   Specifications:   Video/Audio Input IP Video Input:  32-ch Two-way Audio:  1-ch RCA(2.0Vp-p, 1kΩ)   Video/Audio Output VGA Output:  1-ch, resolution: 1920×1080P/60Hz,1600×1200/60Hz,1280×1024/60Hz,1280×720/60Hz, 1024×768/60Hz HDMI Output:  1-ch, resolution:1920 × 1080P /60Hz, 1920 × 1080P /50Hz, 1600 × 1200 /60Hz, 1280 × 1024 /60Hz, 1280 × 720 /60Hz, 1024 × 768 /60Hz Frame Rate:  Main stream: 50 fps (P) / 60 fps (N)Sub-stream: 50 fps (P) / 60 fps (N) Audio Output:  1-ch RCA(Linear, 1kΩ) Synchronous Playback:  16-ch   Hard Disk Driver Interface Type:  4 SATA interfaces for 2 HDDs + 1 DVD-R/W (default), or 4HDDs Capacity:  Up to 4TB capacity for each disk e-SATA Interface:  1 eSATA interface   External Interface Network Interface:  1 RJ45 10M/100M/1000M adaptive Ethernet Interface,16 independent 100Mbps PoE Ethernet interfaces Serial Interface:  1 RS-232 interface; 1 RS-485 interface Alarm Input:  16-ch Alarm Output:  4-ch   General Power Supply:  100~240VAC Consumption:  ≤ 20 W (without hard disk or DVD-R/W) Working Temperature:  -10 °C ~ +55 °C Working Humidity:  10%~90% Chassis:  19-inch rack-mounted 1.5U chassis Dimensions:  445 × 390 × 70 mm(W x D x H) Weight:  ≤ 4 Kg ( without hard disk or DVD-R/W )