REFURBISHED
Cisco
Cisco GLC-SX-MMD Refurbished - 1G SFP Multimode Transceiver
MPN: GLC-SX-MMD
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Lifetime
Warranty
ISO 9001
Certified Testing
R2v3
Responsible Refurb
25+
Years
5K+
Customers
ISO
Certified
✓
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-MMD is a industry-standard 1000BASE-SX Small Form-factor Pluggable (SFP) transceiver engineered for Gigabit Ethernet and 1G Fibre Channel applications over multimode fiber. Operating at an 850nm wavelength with a duplex LC fiber connector interface, this module is a trusted solution for short-reach intra-building and campus network deployments.Designed to integrate seamlessly into Cisco Catalyst switches, routers, and other SFP-compatible platforms, the GLC-SX-MMD supports link lengths of up to 550 meters over 50/125µm OM2 multimode fiber and up to 220 meters over 62.5/125µm OM1 multimode fiber. The 'D' suffix denotes DOM (Digital Optical Monitoring) support, enabling real-time diagnostics such as temperature, voltage, TX power, and RX power — a critical feature for proactive network management and troubleshooting.
This refurbished unit has been professionally inspected and tested to ensure full functional compliance with Cisco specifications, making it an excellent value-driven choice for network expansions, lab environments, or cost-sensitive deployments. Every refurbished transceiver offered by WhaleyComm undergoes quality verification before shipping, so you can deploy with confidence. Whether you are upgrading an existing infrastructure or building out a new network segment, the Cisco GLC-SX-MMD delivers proven Gigabit performance at a fraction of the cost of new.
Technical Specifications
{'Part Number'
'GLC-SX-MMD', 'Brand': 'Cisco', 'Form Factor': 'SFP', 'Data Rate': '1 Gbps (1000BASE-SX)', 'Wavelength': '850nm', 'Fiber Type': 'Multimode', 'Connector Type': 'Duplex LC', 'Max Range (50/125µm OM2)': '550 meters', 'Max Range (62.5/125µm OM1)': '220 meters', 'Digital Optical Monitoring (DOM)': 'Yes', 'Condition': 'Refurbished'}
Ideal Use Cases
Enterprise Campus Distribution Layer
Deploy the GLC-SX-MMD to interconnect distribution and access layer switches across campus buildings using existing multimode fiber infrastructure. Its 550-meter reach over OM2 fiber makes it ideal for intra-building backbone links.
Data Center Top-of-Rack Connectivity
Use this SFP transceiver to provide reliable 1G multimode uplinks between top-of-rack switches and aggregation switches within a data center. DOM support enables proactive monitoring of optical performance to minimize unplanned downtime.
Network Lab and Test Environments
The refurbished GLC-SX-MMD offers a cost-effective solution for building out lab, staging, or development network environments where full Gigabit SFP functionality is required. Its lower price point allows teams to scale test infrastructure without significant capital expenditure.
What's Included
✔ Cisco GLC-SX-MMD Refurbished SFP Transceiver Module
✔ Duplex LC Fiber Connector
✔ Protective Dust Cap
✔ Basic Functionality Testing Verification
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. 25 years, 5,000+ customers.
Compatibility Details
Review supported optics, cables, software, management protocols, and environment-specific compatibility guidance.
✓
The Cisco GLC-SX-MMD is compatible with a wide range of Cisco platforms that support standard SFP slots, including Cisco Catalyst 2960, 3560, 3750, 3850, 4500, 6500, and 9000 series switches, as well as Cisco ISR and ASR series routers. It is also compatible with third-party SFP-compliant switches and routers that accept industry-standard 1000BASE-SX modules. DOM functionality requires platform and software support; verify compatibility with your specific Cisco IOS or IOS-XE software version. Always confirm SFP slot availability and software release compatibility on your target hardware before deployment.
Shipping & Returns
Clear fulfilment, tracking, return, warranty, and support information for enterprise hardware orders.
Shipping
Orders ship within 1-2 business days.
Returns
Contact support for DOA or warranty issues.
Frequently Asked Questions
Product-specific answers about compatibility, testing, warranty, fulfilment, and purchase confidence.
The 'D' suffix indicates that this transceiver supports Digital Optical Monitoring (DOM), which allows network administrators to monitor real-time optical parameters such as temperature, supply voltage, TX output power, and RX received power directly from the device.
The GLC-SX-MMD requires multimode fiber with a duplex LC connector. It supports 50/125µm (OM2) fiber up to 550 meters and 62.5/125µm (OM1) fiber up to 220 meters.
Yes. WhaleyComm's refurbished transceivers are professionally inspected and functionally tested prior to shipment. Refurbished units are a proven cost-effective option for production, lab, and expansion deployments.
The GLC-SX-MMD follows industry-standard 1000BASE-SX SFP specifications and may be compatible with third-party SFP-compliant hardware; however, some platforms may require specific vendor-coded optics. Always verify compatibility with your specific switch or router before purchasing.
Cisco GLC-SX-MMD Refurbished - 1G SFP Multimode Transceiver
$150.00
