Appendix: Optical Connector and Patch Cable

The optical port in the MMA1L10-CR 100GBASE-LR4 optical transceiver is a duplex LC receptacle.

The cable to use between transceivers of this type is a two-fiber single-mode cable, terminated in duplex LC connectors.

Two fiber single mode cable with duplex LC connectors

One fiber for transmitting, the other for receiving.