The OTR-304 is a compact, cost effective fiber optic extender pair capable of extending up to 4ch’s of 270 Mbps up to 3 Gbps over 30 Km on one 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-304 provides error free transmission with RP-198 pathological patterns. The units come standard as stand-alone units, however, using model OTR-1U-C or OTR-4U-C they can also be mounted in a 1U (up to 4 units) or 4U (up to 16 units) 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-304 has an extended temperature range making it a good solution for mounting in NEMA enclosures.