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TP-Link SM321A-2 Single-Mode WDM SFP (Side A, up to 2 km)

Single-fiber SFP module, side A: a link over one fiber instead of two.

184 900 UZS

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Type

SFP single-mode WDM (BiDi)

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Connector

LC simplex

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Side

A (Tx 1310 / Rx 1550)

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Speed

1 Gbps

Specifications

Type: SFP single-mode WDM (BiDi)
Connector: LC simplex
Side: A (Tx 1310 / Rx 1550)
Speed: 1 Gbps
Range: Up to 2 km

The TP-Link SM321A-2 SFP module works with WDM technology: transmit and receive run over a single fiber on different wavelengths. That halves the fiber used in the cable — important when the installed line is already occupied or few fibers are available. The A-side module is paired with a B side, with a range of up to 2 kilometers.

Advantages

One link on one fiber instead of two — saving a scarce cable resource
A range of up to 2 kilometers covers links between buildings on a site
Lets you bring up a new line without laying additional cable
LC simplex connector and compatibility with standard SFP slots
Gigabit speed over the whole distance

Applications

Links between blocks on a plant site
Connecting remote sites when fibers are scarce
Extending the network over cable already installed
CCTV links between remote nodes

Frequently asked questions

Why are different A and B sides needed?

The modules work on opposing wavelengths: the A side transmits on 1310 and receives on 1550, the B side the other way round. A pair of two identical modules will not work.

What if there are enough fibers for both directions?

Then ordinary two-fiber modules are simpler and cheaper. WDM wins precisely when fibers are scarce.

Can modules from different manufacturers be paired?

Technically possible when wavelengths and speed match, but a pair from one manufacturer is more reliable.

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