# SFP Transceiver Module Cisco GLC-SX-MMD — 1000BASE-SX, Multimode 1GbE, LC, 850 nm, 550 m, DDM

**URL:** https://aio.lv/en/product--cisco-glcsxmmdst--11190713
**Data updated:** 2026-04-03 16:17 (EEST)
**Category:** Network Transceiver Modules
**Manufacturer:** Cisco
**Manufacturer code:** GLCSXMMDST
**EAN:** 0065030868587
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

Compatible SFP fiber optic transceiver module for Gigabit Ethernet (1GbE), Cisco GLC-SX-MMD form-factor. Supports 1000BASE-SX over multimode fiber (MMF) at 850 nm wavelength with up to 550 m reach and LC duplex connector. SFP interface, 1250 Mbit/s line rate, DDM support, aluminium housing, typical power 1 W, MTBF ~3.38 million hours. Suitable for switches and routers requiring a 1Gb multimode optics port.

## Long description

The Cisco GLC-SX-MMD compatible SFP transceiver module provides 1GbE optical connectivity for devices with SFP ports. Designed for 1000BASE-SX multimode fiber links, it operates at an 850 nm wavelength and supports duplex LC connections with a maximum link distance of up to 550 meters. The module supports Digital Diagnostics Monitoring (DDM) and features an aluminium housing with low power consumption, making it suitable for use in switches and routers that require a compact, hot-swappable multimode optical interface.
Advantages
This SFP transceiver delivers reliable Gigabit Ethernet performance over multimode fiber while maintaining a compact SFP form factor compatible with Cisco GLC-SX-MMD ports. Low typical power consumption (under 1 W) and an aluminium housing contribute to energy-efficient operation and effective thermal handling. Built-in DDM provides real-time monitoring of optical parameters to help maintain link health. The hot-swappable design allows replacement or upgrades without powering down equipment, minimizing network downtime.
Suitable for
Short- to medium-distance fiber uplinks and distribution links within enterprise networks
Multimode fiber connections between switches, routers and access points
Data center server-to-switch connections where 1Gb multimode optics are required
Network refresh or spare-part inventories for Cisco-compatible equipment
Key specifications
Nominal data rate: 1250 Mbit/s line rate (supports 1000BASE-SX)
Fiber type: Multimode fiber (MMF)
Wavelength: 850 nm
Connector: Duplex LC
Maximum reach: Up to 550 m over MMF
DDM: Supported (Digital Diagnostics Monitoring)
Typical power consumption: \< 1 W
Housing material: Aluminium
Form factor: SFP (hot-swappable)
MTBF: Approximately 3,381,761 hours
Colour: Silver
Weight: Approximately 0.018 kg
How to use
Install the module into an available SFP slot on a compatible switch or router until it latches. Connect a duplex LC multimode fiber patch cable between the transceiver and the corresponding port on the remote device, observing correct transmit/receive orientation. The device should detect the module and establish a 1GbE link; confirm link status using the host device interface and verify DDM parameters if supported. To replace the module, remove it while the system is running (hot-swap) and insert the replacement, then recheck link operation.
Usage recommendations
Use OM3 or OM4 multimode fiber to maximize reliable reach and performance within the specified 550 m distance. Keep fiber connectors and the transceiver optical interface clean to avoid signal degradation. Verify compatibility with the host device firmware and enable DDM monitoring for proactive link diagnostics. Store spare modules in anti-static packaging and avoid mechanical stress on the LC connectors and cables.

## Specifications

### Performance

| Feature | Value |
|---|---|
| Interface type | SFP |
| Maximum data transfer rate | 1250 Mbit/s |
| Networking standards | IEEE 802.3z |
| Duplex system | Full |
| Wavelength | 850 nm |
| Fiber optic connector | LC |
| Maximum transfer distance | 550 m |
| Digital Diagnostics Monitoring (DDM) | Yes |
| Multi-mode fiber (MMF) supported | Yes |
| SFP transceiver standard | SX |

### Network

| Feature | Value |
|---|---|
| SFP transceiver type | Fiber optic |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 5 - 95 |
| Storage temperature (T-T) | -40 - 85 |
| Operating temperature (T-T) | 0 - 70 |

### Logistics data

| Feature | Value |
|---|---|
| Master (outer) case height | 340 mm |
| Master (outer) case width | 350 mm |
| Master (outer) case length | 408 mm |
| Products per master (outer) case | 100 pc(s) |
| Harmonized System (HS) code | 85369010 |

### Features

| Feature | Value |
|---|---|
| Mean time between failures (MTBF) | 3381761 h |
| Product colour | Silver |
| Housing material | Aluminium |
| Hot-swap | Yes |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 46 g |
| Package depth | 92 mm |
| Package height | 32 mm |
| Package width | 119 mm |

### Packaging content

| Feature | Value |
|---|---|
| Quantity per pack | 1 pc(s) |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.018 kg |
| Height | 12.5 mm |
| Width | 13.7 mm |
| Depth | 56.6 mm |

### Power

| Feature | Value |
|---|---|
| Power consumption (typical) | 1 W |

## FAQ

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### What is the warranty period?

All Cisco products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Cisco service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: interface type, maximum data transfer rate, weight, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for SFP Transceiver Cisco GLC-SX-MMD 1000BASE-SX?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

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