E-link Mini-type 12G/3G/HD-SDI Fiber Converter supports 1-channel 12G/3G/HD-SDI Video(audio embedded)& Tally or Reverse RS485 signal transmitted via fiber optical cable, and monitor the signal locally over a 12G/3G/HD-SDI loop output. E-link 3G/HD-SDI Video over Fiber Converters includes one transmitter and one receiver for 12G/3G/HD-SDI signal.