Monoprice 113449 Ironlink SFP-GE-S-IL 1000BASE SX Transceiver

The Monoprice Ironlink 113449 is a small form-factor pluggable (SFP) transceiver module designed as a compatible replacement for the Cisco SFP-GE-S-IL. It operates on the IEEE 802.3z 1000BASE-SX standard, providing Gigabit Ethernet connectivity over multimode fiber at data rates up to 1.25 Gbps. The module supports link distances of up to 220 meters on 62.5/125µm multimode fiber and up to 550 meters on 50/125µm multimode fiber, covering the distance requirements typical of in-building and short-haul campus fiber runs.

Powered by a single +3.3V supply drawn directly from the host switch or router's SFP slot, the Ironlink 113449 requires no external power and operates within a 0–50°C temperature range suitable for standard indoor networking environments. Monoprice positions this module as a cost-effective alternative to OEM optics, and it is coded for direct compatibility with Cisco equipment that accepts the SFP-GE-S-IL designation. For network administrators managing Gigabit fiber infrastructure across multiple ports, the price savings of third-party SFP modules like this one can be substantial when deploying or maintaining switches with dozens of fiber connections.