... video Video input4CH PAL, NTSC (BNC port, 1VP-P,75ohm)Video output1CH PAL, NTSC A composite video output ... input: 1CH audio input(BNC port, 10K¦¸, Vp-p=2.0V LINE)Audio output: 1CH audio output(BNC port ... , 10K¦¸, Vp-p=2.0V LINE)Audio compressionG.722Audio sampling ratio: 8K ... be used to control device by networkBackup:Provides 2 USB 2.0 backup interface on front and back ...