Our 4-Ch TVI/CVI/AHD TO Fiber Converters is universal type supporting High Definition Analog video format HD-TVI/HD-CVI/AHD, can simultaneously transmit 4 channels video and 1-ch RS485 over one core multimode or single-mode optical fiber. It also supports the regular analog video format such as PAL/NTSC/SECAM; it is a kind of universal fiber transmission solution/product for CCTV analog video/data signals. Devices are available for either standalone or rack-mount installation, which is suitable for different working environment. Electronic and optical adjustments are never required. LED indicators are provided for instantly monitoring system status.