The QSFP-100G-LR4-S is a 100 Gigabit Ethernet (100GbE) Quad Small Form-Factor Pluggable (QSFP28) Long Reach (LR4) transceiver. It’s designed for long-distance single-mode fiber (SMF) connections, typically up to 10 kilometers. This transceiver uses four wavelengths multiplexed onto a single pair of fibers to achieve 100GbE. It’s commonly deployed in data centers and telecommunications networks for interconnecting switches and routers over longer distances. The “S” often indicates a standard commercial temperature range.
