Cisco GLC-SX-MM 1000BASE-SX SFP Transceiver Module Multimode Fiber Refurbished
Every WhaleyComm unit is professionally tested, reset to factory defaults, and certified by our in-house engineers — the same standard trusted by 5,000+ organisations across 25 years. Not a refurb marketplace. A certified lifecycle partner.
Tested to factory specification. Backed by 25 years of enterprise trust.
Cisco GLC-SX-MM 1000BASE-SX SFP Transceiver Module – Multimode Fiber
Tested to factory specification. Backed by 25 years of enterprise trust.
The Cisco GLC-SX-MM (MPN: GLC-SX-MM) is a 1000BASE-SX Small Form-Factor Pluggable (SFP) transceiver designed for Gigabit Ethernet applications over multimode fiber. Operating at 850nm, this module supports link lengths of up to 550 meters on 50/125µm multimode fiber and up to 275 meters on 62.5/125µm multimode fiber — making it an ideal choice for high-speed, short-range data center and enterprise network connections.
This unit is offered in Refurbished condition. Every WhaleyComm refurbished optic is thoroughly inspected, cleaned, and tested to original Cisco factory specifications before shipment. You get enterprise-grade performance at a fraction of the cost of new.
Product Highlights
- Vendor: Cisco
- MPN: GLC-SX-MM
- Product Type: Optics / SFP Transceiver
- Interface: 1000BASE-SX Gigabit Ethernet
- Wavelength: 850nm
- Fiber Type: Multimode Fiber (MMF)
- Max Range: Up to 550m (50/125µm MMF) / 275m (62.5/125µm MMF)
- Connector: LC Duplex
- Form Factor: SFP
- Condition: Refurbished – Tested to Factory Specification
- Compatible with: Cisco Catalyst switches, Cisco routers, and other Cisco platforms supporting GLC-SX-MM
Why Buy Refurbished from WhaleyComm?
WhaleyComm has been a trusted source of enterprise networking equipment for over 25 years, serving 5,000+ customers worldwide. Our refurbished units undergo rigorous multi-point inspection and functional testing to ensure they perform exactly as Cisco intended — right out of the box.
Lifetime Warranty
Every WhaleyComm unit ships with a Lifetime Warranty — No Time Limits. No Questions. If your GLC-SX-MM fails under normal operating conditions at any point, we replace it. Simple as that. This is our commitment to you and the reason thousands of network engineers and IT professionals trust WhaleyComm.
Shipping & Returns
- Shipping: Orders ship within 1–2 business days.
- Returns: Contact our support team for any DOA (Dead on Arrival) or warranty-related issues. We make it easy.
Ideal Use Cases
- Data center interconnects and top-of-rack switching
- Enterprise LAN backbone uplinks
- Campus network Gigabit fiber connections
- Replacement or expansion of existing Cisco SFP slots
Looking for a reliable, cost-effective Cisco-compatible SFP transceiver? The refurbished Cisco GLC-SX-MM from WhaleyComm delivers proven Gigabit performance, backed by a lifetime warranty and decades of enterprise expertise.
