The American Fibertek MR0880 is a module receiver component of the 0880 series single fiber bi-directional transreceivers with dual channel audio. The 0880 Series transmits two channels of high-quality bidirectional audio on one multimode optical fiber. Designed to be completely transparent, this product can be used in intercom Tie-lin applications between exchanges. This system requires no field adjustments at installation or additional maintenance thereafter. Diagnostic indicators provide a quick visual indication of system status. Equipment may be ordered as stand alone modules or rack cards that are mounted in the American Fibertek Card Cages: SR-20D/2 or SR-20R/1.