Product Overview
The Cisco GLC-SX-MM is a Gigabit Ethernet SFP transceiver module that provides 1000BASE-SX connectivity over multimode fiber (MMF). Designed for short-range fiber optic links, it operates at a wavelength of 850 nm and supports distances up to 550 meters depending on the fiber type. It is ideal for data centers, enterprise LANs, and access layer connections where high-speed and EMI-resistant networking is required.
Product Details
| Specification | Description |
| Product Model | GLC-SX-MM |
| Form Factor | SFP (Small Form-Factor Pluggable) |
| Interface Type | 1000BASE-SX Gigabit Ethernet |
| Data Rate | 1 Gbps |
| Fiber Type | Multimode Fiber (MMF) |
| Connector Type | LC duplex |
| Wavelength | 850 nm |
| Max Distance | Up to 550 m (50/125 µm MMF) |
| Hot Swappable | Yes |
| Digital Optical Monitoring | No |
| Operating Temperature | 0°C to 70°C |
| Compliance | IEEE 802.3z, RoHS |
| Cisco Compatibility | Catalyst, Nexus, ISR, ASR, and other platforms |
Product Features
Provides 1 Gbps Ethernet over multimode fiber for short-reach applications
Operates at 850 nm wavelength, standard for 1000BASE-SX
Supports fiber distances up to 550 meters depending on fiber type
Compact, hot-swappable SFP design simplifies installation and upgrades
LC duplex connector for standardized MMF fiber interfaces
Widely used in campus networks, wiring closets, and rack-to-rack links
Fully compliant with IEEE 802.3z Gigabit Ethernet standards
Similar Models Comparison
| Model | Data Rate | Interface | Fiber Type | Max Distance | Wavelength | Connector |
| GLC-SX-MM | 1 Gbps | 1000BASE-SX | MMF | 550 m | 850 nm | LC |
| GLC-LH-SM | 1 Gbps | 1000BASE-LX/LH | SMF | 10 km | 1310 nm | LC |
| GLC-ZX-SM | 1 Gbps | 1000BASE-ZX | SMF | 70 km | 1550 nm | LC |
| GLC-T | 1 Gbps | 1000BASE-T | Copper | 100 m | N/A | RJ45 |
Latest Cisco 1G MMF SFP Transceivers
| Model | Fiber Type | Distance | Wavelength | Application |
| GLC-SX-MM | MMF | 550 m | 850 nm | Access and campus aggregation |
| GLC-SX-MM D | MMF | 550 m | 850 nm | Same as SX-MM with DOM |
| SFP-1G-SX | MMF | 550 m | 850 nm | Generic short-reach SFP |
