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

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