The Intel LC Small Form Factor (SFF) optical transceivers are high-performance integrated modules for bi-directional communication over Multimode optical fiber. The Intel TXN31015D2 Quad-Rate 850 nm Optical Transceiver (called hereafter the TXN31015D2 Optical Transceiver) is specifically designed for high-speed Fibre Channel data links at 4.25 Gbps (4x Fibre Channel rate). The TXN31015D2 Optical Transceiver is also backwards compatible with 2x and 1x Fibre Channel and Gigabit Ethernet rates. The TXN31015D2 Optical Transceiver has an LC receptacle compatible with the industry-standard LC connector. The TXN31015D2 Optical Transceiver is Class 1 laser safety compliant with FDA Radiation Performance Standards, 21 CFR 1040.10, and international standards IEC 60825-1 and IEC 60825-2.