... optic communication technology, provides 1-64CH video, 1-32CH bi-dir audio, 1-32CH bi-dir data RS232 ... device, and the other is chassis. For 17-64 channel video devices, there is only chassis provided ... Features Transports 1-64 channels of High quality video, 1-32 channels Bi-dir audio and 1-32 Bi-dir ... 220VAC/-48VDC double hot backup powers 2. Video Channel: 1~64 Format: PAL/NTSC/SECAM Signal:1Vp-p, 75Ω ...