The SFP modules used with the MRC cards are SONET/SDH-compliant (Telcordia Technologies GR-253-CORE and ITU G.957) optical interfaces. The transmitter and receiver reside on the same module and are interconnected to the fiber using small form-factor LC connectors. The SFP modules in the MRC cards support provisionable automatic laser shutdown feature (ITU G.664) to turn off the transmitting laser in the event of a fiber failure on the span. The SFP optical parameters, including laser bias current, optical transmit power, and optical receive power, are available through Cisco Transport Controller to enable simplified troubleshooting and advanced warning of potential impending issues using user-configurable high and low threshold crossing alerts. The SFP cages are angled down relative to the faceplate to reduce bend-induced stresses on the optical fibers exiting the faceplate.