The MGX-SMFIR-8-155-LC is an eight-port, intermediate range back card providing a physical single-mode fiber optic SONET/SDH OC-3/STM-1 interface that conforms to ANSI T1.105, GR-253-CORE, and ITU-T G.957 standards. This interface uses LC connectors, and redundant configurations are supported through Y-cables or APS.