The Blackmagic Design Universal Videohub Optical Interface features 4 optical fiber SDI inputs and 4 optical fiber SDI outputs on a single interface card, re-clocking in SD, HD, and 3 Gb/s. 1310 nm laser drivers and receivers up to 25 km at 3 Gb/s, plus a breakout cable port for deck control. Optical Fiber Interface is a hot-swappable card module designed for use with the Videohub 72 and 288 rack frame routing switchers. Optical Fiber Interface Card also supports 16 channels of embedded SDI audio, so all the audio channels in your signal are routed together with the video. For maximum flexibility, interface cards are all the same size and fit both Universal Videohub 72 and Universal Videohub 288, which is great if you need to use an alternative frame size in the future.