'CISCO CATALYST SWITCHES, CISCO ROUTERS, AND OTHER CISCO PLATFORMS SUPPORTING GLC-SX-MM'}
Cisco GLC-SX-MM Refurbished Optics WhaleyComm
Cisco

Cisco GLC-SX-MM 1000BASE-SX SFP Transceiver Module Multimode Fiber Refurbished

MPN: GLC-SX-MM
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$6.50
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Lifetime
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ISO 9001
Certified Testing
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R2v3
Responsible Refurb
25+
Years
5K+
Customers
ISO
Certified
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Tested

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.

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


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.

Technical Specifications
{'Manufacturer Part Number'
'GLC-SX-MM', 'Brand': 'Cisco', 'Product Type': 'Optics / SFP Transceiver', 'Condition': 'Refurbished – Tested to Factory Specification', 'Vendor': 'Cisco', 'MPN': 'GLC-SX-MM', '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', 'Compatible with': 'Cisco Catalyst switches, Cisco routers, and other Cisco platforms supporting GLC-SX-MM'}
Ideal Use Cases
Inter-Switch Links and Uplinks
Optical transceivers enable high-speed connections between switches, servers, and storage devices where copper is insufficient for the required distance or bandwidth.
Data Center Backbone
Ideal for backbone links between core, distribution, and access switches in data center and campus environments at significant savings versus OEM pricing.
What's Included
✔ Cisco GLC-SX-MM Refurbished Optical Transceiver (1x)
✔ Protective dust caps installed
✔ WhaleyComm ISO 9001-certified inspection and testing certificate
✔ WhaleyComm Lifetime Warranty
Lifetime Warranty — No Time Limits. No Questions.
Every WhaleyComm unit ships with a Lifetime Warranty. If it fails under normal operating conditions at any point, we replace it. No time limits, no expiration, no hidden conditions. Backed by 25 years and 5,000+ satisfied customers.
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Compatibility Details
Review supported optics, cables, software, management protocols, and environment-specific compatibility guidance.
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Platform Compatibility

  • Cisco Switches: Catalyst 3750X, 3850, 4500, 6500, 6800, 9300, 9400, 9500 and Nexus 3000, 5000, 7000, 9000 Series with matching optical slots
  • Cisco Routers: ASR 1000, ISR 4000 Series with matching module slots
  • Fiber: Verify single-mode (SMF) or multimode (MMF) per transceiver model
  • Note: Verify compatibility with target IOS/NX-OS software release before deployment
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Shipping & Returns
Clear fulfilment, tracking, return, warranty, and support information for enterprise hardware orders.
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Shipping
Orders ship within 1-2 business days from our facility in Texas. Overnight and expedited shipping available at checkout.
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Returns
Contact our support team for any DOA or warranty issues. Every WhaleyComm unit is covered by a Lifetime Warranty — we make it right, fast.
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Contact
+1 214 607-4800 | Mon-Fri 8am-6pm CST
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Frequently Asked Questions
Product-specific answers about compatibility, testing, warranty, fulfilment, and purchase confidence.
Refurbished means this Cisco GLC-SX-MM was previously deployed and has since been professionally inspected, cleaned, tested, and verified to meet original factory specifications by WhaleyComm's in-house engineers. It performs identically to a new unit at a significantly lower cost.
Yes. Every WhaleyComm unit ships with a Lifetime Warranty — no time limits, no questions asked. If your Cisco GLC-SX-MM fails under normal operating conditions at any point, we replace it at no cost.
Every unit WhaleyComm ships undergoes an ISO 9001-certified testing process: full power-on diagnostics, port-by-port functionality testing, firmware verification, factory reset, and final inspection. Backed by 25 years of experience and 5,000+ enterprise customers.
Cisco GLC-SX-MM 1000BASE-SX SFP Transceiver Module Multimode Fiber Refurbished
$6.50
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