CATV COAX over fiber 45-870Mhz | RF over fiber up to 20Ghz| L-Band fiber extender 850-2100Mhz | RF Fiber Mininode Transceiver| These Optical to coaxial digital audio and CATV converters can transfer media converted from coax and send to systems using coax to fiber. Coaxial to optical is one of the fastest conversions allowing you to send the data over long distances.