... D1 704*576 or 4 CIF 252*288 4 channel Digital Video Server,Network Video Server,Digital Video Server1.OverviewFBVAD2000 ... WEB & Windows based software3.2.VideoVideo Input:1/2/4 Channel, 1.0Vp-p, 75ΩVideo Standards: PAL625Line,50f/s, ... : 1 channelAudio CompressionADPCMConnector: RCA3.4.Alarm 1/2/4 channel bi-directionalConnector: Terminal Block with Screw ClampsNormally openNominal switching capacity ...