The OTR-308-AD is a cost effective fiber optic transport system capable of extending 8 ch of 3G-SDI with 8 ch bi-directional analog audio and 8ch serial data over fiber. Extend signals from 270 Mbps up to 3 Gbps over 30 Km on a single SM fiber. Meets SMPTE SDI standards maintaining error free transmission of SMPTE 424M, 292M, 259M and ASI over the entire 30 Km distance. The OTR-308-AD provides error free transmission with RP-198 pathological patterns. Along with each SDI video channel, bi-directional analog audio and RS-422/485 serial data are sent on the same fiber. The unit comes in a self contained, rack mountable, 2U modular chassis with redudant power supplies. The flexible design of the OTR 30x series makes it the perfect solution for any application that needs rack mounting or stand-alone units. The OTR-308-AD has an extended temperature range making it a good solution for mounting in NEMA enclosures.