Gigabit SC Single-Mode Optical Module

Gigabit Single-Mode Optical Modules are hot-pluggable SFP transceivers that deliver 1 Gbps Ethernet over single-mode fiber, supporting distances from 10 km to 40 km depending on the model.

Overview

A Gigabit Single-Mode SFP module is a compact, hot-swappable transceiver designed to convert electrical signals from a network device into optical signals suitable for single-mode fiber transmission, enabling 1 Gbps Ethernet connectivity . These modules are widely used in enterprise, data center, and industrial networks for long-distance fiber links, access-layer switching, and legacy infrastructure upgrades .

Key Features

• Hot-Pluggable Design: Can be installed or removed without powering down the switch or router, ensuring minimal network downtime .
• Single-Mode Fiber Support: Optimized for long-distance transmission, typically ranging from 10 km to 40 km depending on the wavelength and module type .
• Wavelengths: Commonly operate at 1310 nm or 1550 nm for single-mode fiber, with some BiDi modules using separate wavelengths for transmit and receive on a single fiber strand .
• Digital Optical Monitoring (DOM): Many modules support real-time monitoring of optical output power, input power, temperature, and voltage, enhancing network reliability and diagnostics .
• Industrial-Grade Options: Rugged metal housings allow operation in extreme temperatures from -40°C to 85°C, suitable for harsh environments .

Types and Standards

• 1000BASE-LX/LH: Standard single-mode SFP for distances up to 10 km over SMF, compatible with IEEE 802.3z .
• 1000BASE-EX/ZX: Extended reach single-mode SFPs for distances up to 40 km or more .
• 1000BASE-BX/BX10-D/U: BiDi single-fiber SFPs for FTTx applications, transmitting and receiving on a single strand using different wavelengths .
• Industrial SFPs: Designed for extreme temperature ranges and high durability, ideal for outdoor or industrial deployments .

Compatibility

Gigabit single-mode SFP modules are MSA-compliant, ensuring interoperability with a wide range of switches and routers from vendors such as Cisco, Intellinet, ZyXEL, TP-Link, Ubiquiti, D-Link, and more . They can be mixed with multimode or copper SFPs on a port-by-port basis, providing flexibility in network design .

Applications

• Long-distance fiber links in enterprise and campus networks
• Industrial and outdoor networking environments
• Fiber-to-the-home (FTTH) and metro networks
• Legacy infrastructure upgrades where 1 Gbps is sufficient

Summary

Gigabit Single-Mode Optical Modules provide cost-effective, reliable, and flexible 1 Gbps connectivity over long distances. Their hot-pluggable design, industrial-grade options, and support for DOM make them ideal for both standard enterprise networks and harsh industrial environments, while maintaining compatibility with a wide range of networking equipment .