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header-product TP-Link Omada TL-SM321B 1000Base-BX WDM Bi-Directional SFP Module Fiber Optic 1250 Mbit/s LC Connector 20 km
21.49 €

TP-Link Omada TL-SM321B 1000Base-BX WDM Bi-Directional SFP Module Fiber Optic 1250 Mbit/s LC Connector 20 km

TP-Link Omada TL-SM321B WDM SFP Module Photo 1
TP-Link Omada TL-SM321B WDM SFP Module Photo 2
TP-Link Omada TL-SM321B WDM SFP Module Photo 1
TP-Link Omada TL-SM321B WDM SFP Module Photo 2

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TP-Link Omada TL-SM321B 1000Base-BX WDM Bi-Directional SFP Module Fiber Optic 1250 Mbit/s LC Connector 20 km

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Short description

TP-Link Omada TL-SM321B 1000Base-BX WDM Bi-Directional SFP Module designed for fiber optic network connections. Features a maximum data transfer rate of 1250 Mbit/s, support for distances up to 20 km, and an LC connector. Utilizes WDM technology for bidirectional data transmission over a single optical fiber. Ideal for integration into network switches and media converters.
Available for order: 20 pcs.
Warranty: 5 Years
SKU: 12732942
free shipment

Cheapest delivery:

Unisend LV

Pick-up points

Unisend LV

Cost

1.99 €

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Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
26.11.2026 {{selectedOffer.officeDeliveryString}}
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Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
01.12.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 € (Weight: 0.13 kg)
Parcel couriers
Unisend LV / Venipak Pickup LV / Venipak Locker LV / DPD Paku skapis / Omniva LV / Latvijas Pasts pakomāts / Latvijas Pasts nodaļa
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From 1.99 €
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Product information

Description

The TP-Link Omada TL-SM321B 1000Base-BX WDM Bi-Directional SFP Module is engineered for high-performance fiber optic network connections. Utilizing advanced WDM technology, this transceiver enables bidirectional data transmission over a single optical fiber strand, effectively optimizing existing cabling infrastructure and reducing deployment costs. It provides a maximum data transfer rate of 1250 Mbit/s and supports long-distance communication up to 20 km. Designed for seamless integration, the module fits into standard SFP slots on compatible network switches and media converters, making it a reliable solution for expanding enterprise and campus networks.

Advantages

This SFP module delivers significant infrastructure savings by allowing dual-direction data traffic over a single fiber optic cable instead of traditional dual-cable setups. Its support for transmission distances up to 20 km makes it suitable for connecting remote buildings or network nodes. The hot-swappable design ensures easy installation and replacement without powering down the host device, minimizing network downtime. Operating efficiently at a standard 3.3 V supplied directly from the host equipment, it ensures stable and energy-efficient performance in various networking environments.

Suitable for

  • Connecting network switches and media converters over long distances up to 20 km
  • Expanding enterprise or campus fiber optic networks using single-strand fiber infrastructure
  • Upgrading existing network links to support 1250 Mbit/s data transfer rates
  • Deployments requiring cost-effective bidirectional communication over single-mode optical fiber

When it may not be suitable

This module is not suitable for networks that require multi-mode fiber optic cabling, as it is specifically designed for 9/125 single-mode optical cables. Additionally, it cannot operate independently without a compatible host device such as a switch or media converter equipped with an SFP slot.

Key specifications

  • Fiber optic SFP transceiver type
  • Maximum data transfer rate of 1250 Mbit/s
  • WDM Bi-Directional technology for single-strand fiber transmission
  • Maximum link length up to 20 km
  • LC connector interface
  • Wavelength: TX 1310 nm / RX 1550 nm
  • Compatible with 9/125 optical cable
  • Operating temperature range from 0 to 70 °C
  • Input voltage of 3.3 V powered from switch or media converter

How to use

To install the module, ensure that the host network switch or media converter is powered on or prepared for hot-swapping according to its manufacturer guidelines. Gently slide the SFP module into the designated SFP slot until it clicks securely into place. Connect the appropriate 9/125 single-mode fiber optic cable with an LC connector to the module port. Ensure that the corresponding complementary module, such as the TL-SM321A, is installed at the opposite end of the fiber link with matching wavelength specifications. Verify the link status through the management interface of the host device.

What to consider before purchase

  • Verify that your network hardware features a compatible SFP slot and supports 1000Base-BX standards
  • Check that the existing or planned fiber optic cabling is single-mode 9/125 with LC connectors
  • Ensure the opposite end of the fiber link uses the correct matching counterpart module model
  • Confirm that the required transmission distance does not exceed the 20 km limit

Usage recommendations

For stable and continuous network operation, always ensure that optical connectors are clean and free from dust before insertion. Pair this TL-SM321B module with the corresponding TL-SM321A module on the remote end of the connection to maintain correct wavelength pairing for bidirectional transmission.

Specifications

Maximum transfer distance: The greatest distance over which the data/signal can be transferred.
20000 m
Maximum data transfer rate: The maximum speed with which data can be transmitted from one device to another.
1250 Mbit/s
All features
Interface type:
SFP
Maximum operating temperature:
70 °C
SFP transceiver type:
Fiber optic
Minimum operating temperature:
0 °C

Logistics data

Quantity per pack:
1 pc(s)

Technical details

Single-mode fiber (SMF) supported:
Yes

Certificates

Certification:
FCC, CE

Packaging content

User guide:
Yes

Operational conditions

Storage relative humidity (H-H):
5 - 90
Operating relative humidity (H-H):
10 - 90
Storage temperature (T-T): The minimum and maximum temperatures at which the product can be safely stored.
-40 - 85
Operating temperature (T-T): The minimum and maximum temperatures at which the product can be safely operated.
0 - 70

Weight & dimensions

Height: The measurement of the product from head to foot or from base to top.
12.9 mm
Depth: The distance from the front to the back of something.
14.6 mm
Width: The measurement or extent of something from side to side.
55.4 mm

Power

Input voltage: The voltage (V) which is required to power the product.
3.3

Features

Product colour: The colour e.g. red, blue, green, black, white.
Silver
Hot-swap:
Yes
Digital Diagnostics Monitoring (DDM):
Yes

Performance

Fiber cable diameters supported (core/cladding):
9/125
Rx wavelength (max):
1550 nm
Tx wavelength (max):
1310 nm
Maximum transfer distance: The greatest distance over which the data/signal can be transferred.
20000 m

Network

Maximum data transfer rate: The maximum speed with which data can be transmitted from one device to another.
1250 Mbit/s

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Product comparison

The TP-Link TL-SM321B Omada module is compared with several alternative optical transceivers and media converters. All of these devices are designed for fiber optic communication using WDM (Bi-Directional) technology, but they differ in maximum transmission distance, data transfer rate, and connection interfaces.

⚙️ Below is a comparison of key technical characteristics, including maximum transfer distance, speed, and connector types.

ParameterTP-Link TL-SM321B OmadaSFP TP-Link 1000Base-BXIntellinet 40 kmTP-Link TL-FC111B-20Intellinet 80 kmIntellinet 120 kmPractical significance
Device typeSFP moduleSFP moduleSFP moduleMedia converterSFP moduleSFP moduleDetermines how the device connects to network hardware (SFP slot vs standalone enclosure).
Transfer rate1250 Mbit/s1250 Mbit/s1000 Mbit/s100 Mbit/s1000 Mbit/s1000 Mbit/sAffects throughput capacity in gigabit or fast Ethernet networks.
Transmission distanceUp to 20 kmUp to 10 kmUp to 40 kmUp to 20 kmUp to 80 kmUp to 120 kmAllows selecting a module matching the exact length of the fiber optic cable run.

◎ The table below evaluates device suitability for different networking scenarios and use cases.

Use caseRecommended productWhy
Medium-range links up to 20 km at gigabit speedsTP-Link TL-SM321B OmadaProvides an optimal balance of a 20 km range and 1250 Mbit/s speed for standard business networks.
Connecting standard switches without SFP slotsTP-Link TL-FC111B-20Converts fiber optic signals to standard copper RJ45 Ethernet ports.
Ultra-long distance fiber links from 80 to 120 kmIntellinet (80 km or 120 km)Designed specifically for extreme distance single-mode fiber transmissions.

The TP-Link TL-SM321B Omada is well-suited for establishing reliable gigabit optical connections over distances up to 20 km. Choose it if you need a standard high-speed SFP transceiver for compatible networking hardware. For longer distances or equipment lacking SFP slots, alternative models from the comparison may be more appropriate.

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Customer reviews

Customer questions

FAQ

How much does the TP-Link Omada TL-SM321B WDM SFP Module cost, and is it available for purchase?

The price is 21.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 20 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 26.11.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All TP-LINK products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized TP-LINK service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: maximum transfer distance, maximum data transfer rate, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

Where can I download the instructions for TP-Link Omada TL-SM321B WDM SFP Module?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.
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