1000Base-SX SFP Transceiver

Cisco GLC-SX-MMD=-RFB is a refurbished 1000BASE-SX SFP transceiver for Gigabit Ethernet links over multimode fiber. It is intended for network equipment with a compatible SFP interface.

The module operates at 850 nm and has a dual LC/PC optical connector. Its DOM support provides digital optical monitoring, while the documented extended operating temperature range distinguishes this MMD model from basic SX variants.

This listing identifies the unit as refurbished and gives OEM reference 407530. The Cisco designation and full MPN identify the specific product variant.