Cisco GLC-SX-MMD 1000BASE-SX SFP Transceiver Module - 550m MMF, 850nm, DOM (Refurbished)

Product Overview

Upgrade your network infrastructure cost-effectively with the Cisco GLC-SX-MMD 1000BASE-SX SFP Transceiver Module. This enterprise-grade, Certified Refurbished optical transceiver is designed for Gigabit Ethernet connectivity in corporate data centers, campus networks, and wiring closets. Operating at a wavelength of 850nm, it delivers reliable 1 Gbps data transfer speeds over multimode fiber (MMF) cabling.

Unlike the older GLC-SX-MM model, this "MMD" version features Digital Optical Monitoring (DOM), allowing network administrators to monitor real-time parameters such as optical output power, optical input power, temperature, and transceiver supply voltage. ideal for connecting Cisco Catalyst switches, routers, and firewalls, this unit has been rigorously tested by our technicians to ensure 100% functionality. Backed by ServerDukan's 1-Month Warranty and fast shipping across India.

Key Features

• Digital Optical Monitoring (DOM): Intelligent interface (SFF-8472 compliant) allows real-time monitoring of signal strength, temperature, and voltage for proactive network troubleshooting.
• Extended Range Connectivity: Supports links up to 550 meters on 50/125µm OM2 multimode fiber and 220 meters on 62.5/125µm OM1 fiber.
• Hot-Swappable Design: Allows for easy installation and replacement without powering down the host switch or router, maximizing network uptime.
• Broad Compatibility: Fully compatible with a wide range of Cisco equipment including Catalyst 2960, 3560, 3750, 3850, and 9000 series switches.
• High Performance: Delivers full-duplex 1 Gbps throughput using standard LC duplex fiber connectors.

Technical Specifications

Technical Insight: GLC-SX-MMD vs GLC-SX-MM

Many customers ask about the difference between these two popular models. The primary advantage of the MMD model is the inclusion of Digital Optical Monitoring.

Why Choose Refurbished from ServerDukan?

Purchasing refurbished networking equipment is a smart strategy for IT budgets. At ServerDukan, "Refurbished" means Reliability. Every Cisco GLC-SX-MMD module undergoes a multi-step testing process by certified technicians. We specifically test the optical transmit power (dBm) and receive sensitivity to ensure the laser has not degraded and matches original factory specifications.

By choosing refurbished, you save up to 80% off the list price without sacrificing performance. This allows you to acquire spare modules for redundancy or expand your network for a fraction of the cost. All units are cleaned, reset, and packaged in anti-static protection. With our 1-Month Warranty and immediate availability, you get enterprise-grade hardware with total peace of mind.

Compatibility Matrix

Ideal Use Cases & Deployment Scenarios

• Campus LAN Distribution: Perfect for connecting access layer switches in different buildings or floors to a central distribution switch using existing multimode fiber backbones within 550 meters.
• Server Uplinks: Use the GLC-SX-MMD to provide high-speed 1Gbps uplinks from servers to Top-of-Rack (ToR) switches in data center environments.
• Storage Area Networks (SAN): Suitable for IP-based storage networking where reliable, short-range fiber connectivity is required between storage arrays and controllers.
• ISP & Telecom Aggregation: Used by internet service providers for short-haul fiber aggregation links in Points of Presence (PoPs) or central offices.
• Industrial Factory Floors: When housed in compatible industrial switches, these modules provide fiber isolation against electromagnetic interference (EMI) common in manufacturing environments.

What's Included

• 1x Cisco GLC-SX-MMD 1000BASE-SX SFP Transceiver Module (Certified Refurbished)