The maximum speed of a 100Mbps optical module is 100 megabits per second (Mbps).

Overview

A 100Mbps optical module, such as a 100BASE-FX SFP, is designed to transmit Fast Ethernet signals at 100Mbps over fiber optic cables . These modules convert electrical Ethernet signals from a switch or router into optical signals for transmission over multimode or single-mode fiber, and then back to electrical signals at the receiving end . The 100Mbps speed is defined by the IEEE 802.3u Fast Ethernet standard and is the maximum data rate these modules can support .

Key Specifications

• Data Rate: 100Mbps full-duplex
• Wavelength: Typically 1310nm for 100BASE-FX modules
• Transmission Distance: Varies by module and fiber type, ranging from 2 km over multimode fiber to up to 150 km for industrial-grade single-mode modules
• Encoding: 4B/5B encoding for Fast Ethernet
• Interface: SFP (Small Form-factor Pluggable), hot-swappable

Variants and Dual-Speed Modules

Some SFP modules, like the 100LX/1000LX dual-speed SFPs, can operate at either 100Mbps or 1Gbps depending on the network configuration . However, when operating in 100Mbps mode, the maximum speed remains 100Mbps, conforming to the 100BASE-LX or 100BASE-FX standard .

Practical Considerations

• Fiber Type: Multimode fiber is commonly used for shorter distances (up to 2 km), while single-mode fiber supports longer distances (up to 150 km for industrial-grade modules), .
• Full-Duplex Operation: Most 100Mbps optical modules support full-duplex communication, allowing simultaneous transmission and reception at 100Mbps .
• Compatibility: These modules are compatible with standard SFP ports on switches, routers, and media converters, enabling flexible deployment without replacing the entire device . In summary, 100Mbps optical modules are limited to a maximum data rate of 100Mbps, with variations in distance, fiber type, and wavelength depending on the specific module and deployment scenario .