Tp-link ThinkPad-Link Omada Gigabit Single-Mode WDM Bi-Directional SFP Module SM321B-2

Network managers often struggle with extending gigabit links over long distances without costly infrastructure upgrades. The Tp-link ThinkPad-Link Omada Gigabit Single-Mode WDM Bi-Directional SFP Module SM321B-2 solves this by letting you run 1 Gbps traffic on a single strand of fibre, using two different wavelengths for send and receive. It plugs into any compatible TP-LINK router, switch or media converter, giving you a reliable, high-speed connection up to 10 km (6.2 miles) away.

Tp-link ThinkPad-Link Omada Gigabit Single-Mode WDM Bi-Directional SFP Module SM321B-2 - your answer to distance-limited fibre links

When a network needs to reach remote offices, warehouses or outdoor sites, the lack of a simple, cost-effective solution can cause downtime and lost productivity. This problem matters because every extra kilometre of cable often means new hardware, higher power consumption and complex installation. The Tp-link ThinkPad-Link Omada Gigabit Single-Mode WDM Bi-Directional SFP Module SM321B-2 provides a clear fix: a single-mode, bidirectional transceiver that uses wavelength-division multiplexing to double the data flow on one fibre pair, eliminating the need for separate fibres or expensive repeaters.

Usages of Tp-link ThinkPad-Link Omada Gigabit Single-Mode WDM Bi-Directional SFP Module SM321B-2

The module fits a variety of scenarios where long-range, high-speed connectivity is essential.

• Extending campus networks between buildings up to 10 km apart.
• Connecting remote data-centre nodes without laying new cable bundles.
• Linking outdoor surveillance cameras that require stable gigabit links.
• Providing backhaul for wireless access points in large venues.
• Integrating with TP-LINK Omada managed switches for seamless network expansion.

Key Features of Tp-link ThinkPad-Link Omada Gigabit Single-Mode WDM Bi-Directional SFP Module SM321B-2

• Form Factor: Plug-in module. A compact design that slots directly into standard SFP ports.
• Connectivity Technology: Wired. Reliable physical connection with no wireless interference.
• Data Transfer Rate: 1.25Gbps. Supports faster than standard gigabit Ethernet for future-proofing.
• Optical Wave Length: 1310 nm (TX) / 1550 nm (RX). Uses two distinct wavelengths to send and receive on the same fibre.
• Cabling Type: Ethernet 1000Base-BX. Compatible with industry-standard single-mode fibre infrastructure.
• Data Link Protocol: Gigabit Ethernet. Ensures seamless integration with existing network equipment.
• Max Transfer Distance: 1.2 miles (per specification) and up to 10 km when paired with TP-LINK devices. Provides flexible deployment options.
• Metal Housing, Bidirectional, DDM, Hot Swappable, TCP/IP support, WDM. Robust metal case protects the optics, while digital diagnostics monitoring lets you track performance in real time.
• Power Requirement: 3.3 V. Low power draw simplifies power budgeting in rack installations.
• Dimensions: Width 55.4 mm, Depth 14.6 mm, Height 12.9 mm. Small footprint fits tight spaces in network cabinets.

Benefits of Tp-link ThinkPad-Link Omada Gigabit Single-Mode WDM Bi-Directional SFP Module SM321B-2

You gain the ability to stretch your gigabit network far beyond the usual 550 m limit of single-mode fibre, saving on cable costs and installation time. The bidirectional design means only one fibre strand is needed, reducing clutter and simplifying routing. Hot-swap capability lets you replace or upgrade modules without shutting down the network, keeping your operations running smoothly. Built-in digital diagnostics give you instant insight into signal quality, helping you prevent issues before they affect users. Finally, the rugged metal housing and wide operating temperature range ensure reliable performance in both office environments and harsher industrial settings.

Specifications