Tp-link Usa Corporation SM321A-2 1000BASE-BX Sfp Module

Product Description

The TP-LINK USA CORPORATION SM321A-2 is a 1000BASE-BX WDM bidirectional SFP transceiver module designed for Gigabit Ethernet fiber network deployments. Operating on a single strand of fiber using wavelength-division multiplexing (WDM), this module transmits and receives on separate wavelengths over one fiber rather than two, reducing fiber infrastructure requirements. It is installed by network technicians and IT infrastructure professionals in switches, media converters, and other SFP-compatible network equipment that require single-fiber Gigabit connectivity.

This SFP module is suited for structured cabling environments where single-strand fiber runs are preferred, including commercial buildings, data centers, and campus network backbones. The bidirectional WDM design makes it a practical choice when fiber strand count is limited or when consolidating existing single-fiber runs into a Gigabit network upgrade. It ships as a single unit and is compatible with SFP-slot equipment that supports the 1000BASE-BX standard.

Key Features

• 1000BASE-BX standard for Gigabit Ethernet over single-strand fiber using WDM
• Bidirectional operation eliminates the need for a second fiber strand
• SFP form factor fits standard SFP slots on switches, routers, and media converters
• Sold as a single module (EA, quantity 1 per unit)

Compatibility

Designed as a standard SFP form-factor module for use in network switches, media converters, and routers equipped with 1000BASE-BX-compatible SFP slots. Verify host equipment support for WDM bidirectional operation before installation.

Installation Notes

Installation should be performed by a qualified network technician familiar with fiber optic handling and SFP transceiver procedures. Power down or disable the SFP port on the host device before inserting or removing the module where required by the equipment manufacturer. Clean fiber connectors before mating to avoid signal loss. A matched bidirectional SFP module with complementary TX and RX wavelengths must be installed at the far end of the fiber link for proper operation.