SFP optical module MaxLink ML-S5531-20 WDM BiDi 1550nm 20km

The MaxLink ML-S5531-20 is a compact SFP optical module that supports WDM BiDi transmission at 1550 nm with a reach of up to 20 km. Designed for insertion into compatible SFP ports on media converters, switches and other network equipment, this module provides single-fiber bidirectional links that help extend existing fiber infrastructure without adding parallel fibers. The small form factor and standard SFP interface make it suitable for upgrades and replacements in active equipment that accepts SFP transceivers.

Advantages

The module enables bidirectional communication over a single optical fiber using WDM BiDi technology at 1550 nm, reducing fiber cabling requirements. Its compact SFP form factor ensures compatibility with a wide range of devices that support standard SFP transceivers. With a specified reach of up to 20 km, it supports medium-distance links for campus, access and point-to-point applications while preserving existing fiber routes.

Suitable for

• Extending fiber networks and upgrading links without laying new fibers
• Point-to-point single-fiber connections between switches and media converters
• Deployments that require WDM BiDi operation at 1550 nm
• Replacing or adding SFP transceivers in compatible network equipment

Key specifications

• Optical wavelength: 1550 nm
• Connector type: SFP form factor for standard SFP ports
• Transmission mode: WDM BiDi (bidirectional on a single fiber)
• Maximum link distance: up to 20 km
• Typical application: single-fiber point-to-point links, fiber extension

How to use

Insert the ML-S5531-20 module into a compatible SFP slot on network equipment, ensuring the host device supports WDM BiDi transceivers at 1550 nm. Connect the single-mode fiber to the module's optical port using the appropriate connector type for your equipment. Verify link status and configure the host device as required; the transceiver operates transparently as an SFP module and typically requires no additional software installation. Observe ESD precautions and ensure physical alignment of fiber connectors to maintain signal quality.

Usage recommendations

Use single-mode fiber with proper attenuation and connector cleanliness for reliable operation up to 20 km. Confirm compatibility with the host device's SFP specifications and support for WDM BiDi at 1550 nm before installation. Keep operating environments within the equipment's specified temperature and humidity ranges and inspect connectors regularly to avoid signal loss.