... the latest optic communication technology, provides 1-64CH video, 1-32CH bi-dir audio, 1-32CH bi ... device is compatible with NTSC, PAL and SECAM video, and can transmit high quality image and real- ... the other is chassis. For 17-64 channel video devices, there is only chassis provided. Front panel ... 48VDC Chassis: 220VAC/-48VDC double hot backup powers 2. Video Channel: 1~64 Format: PAL/NTSC/SECAM Signal: ...