Which type of 100Mbps fiber optic switch is used

100BASE-FX SFP switches are commonly used for 100Mbps fiber optic networks, supporting multimode fiber with LC duplex connectors and distances up to 2 km.

Overview of 100BASE-FX SFP

A 100BASE-FX SFP is a 100Mbps Fast Ethernet optical transceiver designed to transmit data over multimode fiber using the 100BASE-FX standard. It operates at a wavelength of 1310nm and supports distances up to 2 km over multimode fiber, providing better noise immunity and longer reach compared to copper 100BASE-TX connections . These SFP modules are hot-swappable and compatible with switches, routers, and media converters that explicitly support 100BASE-FX SFPs .

Switch Compatibility

Certain switches are designed to support 100BASE-FX SFP modules. For example, D-Link switches such as the DES-1228, DES-1228P, DES-1252, DHS-3028, DHS-3628F, DHS-3626F, and DGS-3612G can accommodate 100BASE-FX SFP transceivers in their Gigabit combo SFP ports . Cisco Catalyst 6500 Series switches also provide 100BASE-FX modules for access and distribution layers, supporting multimode and single-mode fiber with modular SFP optics .

Key Features

• Port Type: SFP (Small Form-factor Pluggable)
• Connector: Typically LC duplex, some legacy versions use SC
• Fiber Type: Multimode (62.5 or 50-micron core) or single-mode
• Distance: Up to 2 km for multimode fiber, up to 10 km for single-mode fiber
• Duplex Mode: Full-duplex 100Mbps (200Mbps effective)
• Applications: Industrial Ethernet, campus backbones, surveillance networks, and legacy Fast Ethernet systems

Deployment Considerations

• Ensure the switch explicitly supports 100BASE-FX SFP modules, as some SFP ports may only support Gigabit optics.
• Match the fiber type and connector type to the SFP module for stable operation.
• Consider the link budget and optical power to maintain reliable connectivity over the intended distance .
• 100BASE-FX remains relevant in environments requiring EMI immunity, longer reach, and stable legacy network support, even though Gigabit and higher-speed optics dominate modern networks . In summary, for 100Mbps fiber optic networks, 100BASE-FX SFP switches with compatible SFP transceivers are the standard choice, offering reliable, interference-resistant connectivity for multimode or single-mode fiber deployments.