GLC-SX-MM-RGD is a Cisco ruggedized Gigabit Ethernet SFP transceiver designed for industrial and harsh-environment deployments. It’s a 1000Base-SX, multimode fiber SFP built to operate across extended temperature ranges, making it suitable for factories, outdoor cabinets, transportation systems, and utility networks.
Why buyers pick GLC-SX-MM-RGD (plain English)
Built for harsh conditions Ruggedized design supports reliable operation in extreme temperatures and industrial environments.
Short-range fiber connectivity Multimode SX optics are ideal for short to medium distances within facilities and sites.
Industrial network friendly Commonly used in manufacturing, transportation, utilities, and outdoor network deployments.
Standard SFP form factor Plugs into compatible Cisco switches and routers with SFP ports.
Cisco-qualified reliability Tested and validated to meet Cisco rugged hardware standards.
60-second spec box (GLC-SX-MM-RGD)
Form factor SFP (Small Form-Factor Pluggable)
Speed / protocol Gigabit Ethernet (1000Base-SX)
Fiber type Multimode fiber (MMF)
Wavelength 850 nm
Connector LC duplex
Max distance Up to ~550 m (fiber dependent)
Operating temperature Extended / rugged temperature range
Use case Industrial and harsh-environment short-range Gigabit fiber links.
Where it fits (and when to choose something else)
Perfect for:
Industrial Ethernet deployments
Factories and warehouses
Outdoor cabinets and enclosures
Short-range fiber links in harsh environments
Choose something else if:
You need long-distance fiber → LX or ZX SFPs
You’re in climate-controlled spaces → standard SX SFPs
You’re using single-mode fiber → LX optics
TL;DR
GLC-SX-MM-RGD is Cisco’s ruggedized 1000Base-SX SFP: a multimode Gigabit fiber transceiver built for reliable operation in industrial and extreme environments.
Key specifications
Feature
Specification
Source
Form Factor
SFP (mini-GBIC)
Data Rate
1.25 Gbps (1 GbE)
Standard
1000BASE-SX (short wavelength)
Wavelength
850 nm
Media Type
Multi-Mode Fiber (MMF)
Connector
Duplex LC
Maximum Distance
550 m over OM2 fiber
Operating Temperature
Industrial grade: -40°C to 85°C (-40°F to 185°F)
Digital Optical Monitoring (DOM)
Yes
Power Consumption
< 1 Watt
Features and use cases
Rugged Design: The "-RGD" suffix indicates the module is built for rugged conditions, with a wider temperature range for industrial applications compared to standard SFP modules.
Industrial Networks: This SFP is ideal for industrial switches and routers deployed in locations with extreme temperature fluctuations, such as factories, outdoor installations, and other non-climate-controlled environments.
Hot-Swappable: The transceiver can be inserted or removed while the equipment is powered on, allowing for upgrades or replacements without network interruption.
DDM Support: Digital Optical Monitoring (DOM) allows for real-time monitoring of the transceiver's status, including temperature, voltage, and optical power.
Standards Compliant: It meets Multi-Source Agreement (MSA) standards, ensuring interoperability with a wide range of compliant networking devices.
