Cisco Compatible GLC-SX-MM / MMD / RGD / SFP-GE-S | 1G SFP SX 850nm 550m
Cisco Compatible Transceivers

Cisco Compatible GLC-SX-MM / MMD / RGD / SFP-GE-S | 1G SFP SX 850nm 550m

Buy Cisco compatible GLC-SX-MM, GLC-SX-MMD, GLC-SX-MM-RGD, and SFP-GE-S 1G SFP SX modules. 850nm up to 550m over MMF, fully tested and reliable.

Cisco Compatible GLC-SX-MM / GLC-SX-MMD / GLC-SX-MM-RGD / SFP-GE-S SFP Transceiver | 1GBASE-SX, LC Duplex, MMF (550m)

Product Overview

The Cisco Compatible GLC-SX-MM / GLC-SX-MMD / GLC-SX-MM-RGD / SFP-GE-S SFP Transceivers are a complete family of 1Gbps multimode SFP modules designed for short-range transmission over multimode fiber (MMF). Operating at an 850nm wavelength, these modules support distances of up to 550 meters, making them ideal for enterprise networks, data centers, and campus environments.
This product series includes multiple variants to meet different deployment needs:
  • GLC-SX-MM – Standard 1G SX module
  • GLC-SX-MMD – SX module with DOM/DDM monitoring
  • GLC-SX-MM-RGD – Rugged/industrial-grade SX module
  • SFP-GE-S – Cisco equivalent 1000BASE-SX module
All models are fully compatible with Cisco platforms and provide reliable, cost-effective alternatives to OEM optics.


Key Features

  • Supports 1Gbps data rate (1000BASE-SX)
  • 850nm VCSEL laser for multimode fiber
  • Up to 550m transmission over OM2 MMF
  • LC duplex connector interface
  • Hot-pluggable SFP form factor
  • Fully compatible with Cisco SFP ports
  • Low power consumption
  • MSA compliant and fully tested
Variant Highlights:
  • GLC-SX-MMD: Supports DOM/DDM monitoring
  • GLC-SX-MM-RGD: Industrial-grade, extended temperature range
  • SFP-GE-S: Equivalent Cisco SX model used across platforms


Technical Specifications

General Parameters
  • Form Factor: SFP
  • Data Rate: 1Gbps
  • Wavelength: 850nm
  • Transmission Distance:
  • 275m (OM1 MMF)
  • 550m (OM2 MMF)
  • Connector: LC Duplex
  • Fiber Type: Multimode Fiber (MMF)
Optical Characteristics
  • Transmitter Type: VCSEL
  • Receiver Type: PIN Photodiode
  • TX Power: -9.5 ~ -3 dBm
  • RX Sensitivity: ≤ -17 dBm
Electrical & Environmental
  • Power Consumption: ≤ 1W
  • Operating Temperature:
  • Standard: 0°C to 70°C
  • Industrial (RGD): -40°C to 85°C
  • Storage Temperature: -40°C to 85°C
Additional Features
  • DOM/DDM (GLC-SX-MMD only):
  • TX/RX optical power monitoring
  • Temperature & voltage monitoring
Compliance
  • IEEE 802.3z (1000BASE-SX)
  • SFP MSA compliant
  • RoHS compliant


Applications

  • Enterprise LAN and campus networks
  • Data center short-range connectivity
  • Switch-to-switch interconnects
  • Server and storage networking
  • Industrial and outdoor network deployments (RGD)


Model Comparison

Model
Distance
DOM/DDM
Temperature
Use Case
GLC-SX-MM
550m
❌ No
0–70°C
Standard deployment
GLC-SX-MMD
550m
✅ Yes
0–70°C
Monitoring & diagnostics
GLC-SX-MM-RGD
550m
Optional
-40–85°C
Industrial environments
SFP-GE-S
550m
❌ No
0–70°C
Cisco equivalent


Why Choose This Product

This Cisco-compatible 1G SX SFP series is one of the most widely deployed optical solutions worldwide. It offers:
  • Proven reliability for short-distance networking
  • Flexible options for different environments
  • Cost-effective replacement for OEM optics
  • Enhanced visibility with DOM (MMD version)
  • Industrial durability (RGD version)
It is ideal for both new installations and maintaining legacy 1G infrastructure.


When to Choose These Modules

Choose this SX series if:
✔ Distance is within 550 meters ✔ Using multimode fiber (MMF) ✔ Need reliable and cost-effective 1G connectivity
Choose specific models based on needs:
  • GLC-SX-MMD → Need monitoring
  • GLC-SX-MM-RGD → Harsh/industrial environments
  • GLC-SX-MM / SFP-GE-S → Standard use
Choose LX/LH modules if:
✔ Single-mode fiber is required ✔ Distance exceeds 550m




Cisco compatible GLC-SX-MM, GLC-SX-MMD, GLC-SX-MM-RGD, SFP-GE-S, 1G SFP SX module, 1000BASE-SX transceiver, Cisco SFP multimode 850nm, LC SFP 550m