Digital Video Server 1:There is the same network feature as ip camera. 2:channel, CIF 3:channel, D1 Digital Video Server1 Video Resolution: ... -3G4 channel, D1, support 3G Network:EVDO( CDMA2000),WCDMAVideo Input 1/2/4 channel composite video, PAL or NTSC, BNC interface ... : 75Ω,Audio Compression G.726, G711, ADPCMAudio Input1/2/4 channel, RCA port, liner input, Impedance:1KOhmsAudio Output1channel,RCA ...