AB-D series video/audio/data fiber optics adopts digital communication mode. One channel or multiple channel video/audio/data signals (RS232/RS485 /RS422, telephone, switch, 10M/100M Ethernet signal) is carried out over fibers. The products contain cost-effective commercial quality system; high benefit 10BIT digital non-compress broadcast quality transmission system, and Loop thru video application with MPEG-4 and H.264 technology.