The cisco 10gbase x2 modules offer customers a wide variety of 10 gigabit ethernet connectivity options for data center enterprise wiring closet and service provider transport applications the cisco 10gbase lrm module supports link lengths of 220m on standard fiber distributed data interface fddi grade multimode fiber mmf to ensure that specifications are met over fddi grade om1 and om2 fibers the transmitter should be coupled through a mode conditioning patch cord no mode conditioning