# SFP transceiver module TP-Link TL-SM321B

**URL:** https://aio.lv/en/product--tp-link-tl-sm321b-2--3593825
**Data updated:** 2025-12-01 21:11 (EET)
**Category:** Network Transceiver Modules
**Manufacturer:** TP-LINK
**Manufacturer code:** TL-SM321B-2
**EAN:** 6935364072940
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 14.49 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 11.98 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tp-link-tl-sm321b-2--3593825

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.06.2026 | free |
| Pickup points | 03.07.2026 | 1.99 EUR |
| Courier delivery to door | 03.07.2026 | 4.99 EUR |

## Summary description

The TP-Link TL-SM321B is a fiber optic SFP transceiver module with a maximum data transfer rate of 1250 Mbit/s. It features a metallic design and is certified by FCC and CE. Dimensions are 55.4 mm x 14.6 mm x 12.9 mm, making it compact for easy integration. This module is ideal for high-speed network connections and ensures reliable performance.

## Long description

The TP-LINK TL-SM321B fiber module supports the 1000Base-BX standard, enabling Gigabit transmission over a single optical fiber strand by using different wavelengths for each direction. It extends network links up to 10 km when used with compatible TP-LINK routers, switches or media converters, providing high-speed and stable connections for network backbones and long-distance uplinks.
Advantages
The TL-SM321B uses single-strand fiber transmission to halve fiber cabling compared with dual-strand solutions, simplifies infrastructure and reduces deployment cost. It is compatible with TP-LINK routers, switches and media converters to ensure interoperability and stable data transfer at Gigabit speeds over long distances.
Key specifications
 Standard: 1000Base-BX (Gigabit over single fiber)
 Maximum distance: up to 10 km (6.2 miles)
 Fiber type: single strand (single-mode)
 Compatibility: TP-LINK routers, switches and media converters
 Data rate: 1 Gbps
How to use
Install the TL-SM321B module into a compatible TP-LINK device or media converter following the device manual. Connect a single-mode fiber cable to the module and pair it with the corresponding module at the remote end using the correct transmit/receive wavelengths. Verify link status in the network device interface and ensure both ends are configured to operate at Gigabit speed.
Recommendations
Use quality single-mode fiber and proper connectors to maintain signal integrity. For distances near 10 km, check link budget and consider using appropriate optical attenuators or testing equipment to confirm signal levels. Ensure firmware and device compatibility when integrating with other TP-LINK equipment.

## Specifications

### Performance

| Feature | Value |
|---|---|
| Interface type | SFP |
| Maximum data transfer rate | 1250 Mbit/s |
| Networking standards | IEEE 802.3z |
| Fiber optic connector | LC |
| Maximum transfer distance | 1000 m |
| Fiber cable diameters supported (core/cladding) | 9/125 |
| Wavelength-division multiplexing (WDM) | Yes |
| Rx wavelength (max) | 1550 nm |
| Tx wavelength (max) | 1310 nm |
| Multi-mode fiber (MMF) supported | No |
| Single-mode fiber (SMF) supported | Yes |
| SFP transceiver standard | BX |

### Network

| Feature | Value |
|---|---|
| SFP transceiver type | Fiber optic |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 60 g |
| Package depth | 122.5 mm |
| Package height | 38.5 mm |
| Package width | 81.5 mm |
| Number of products included | 1 pc(s) |
| User guide | Yes |

### Logistics data

| Feature | Value |
|---|---|
| Harmonized System (HS) code | 85369010 |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 10 - 90 |
| Storage temperature (T-T) | -40 - 80 |
| Operating temperature (T-T) | 0 - 70 |
| Storage relative humidity (H-H) | 5 - 90 |

### Certificates

| Feature | Value |
|---|---|
| Certification | FCC, CE |

### Weight & dimensions

| Feature | Value |
|---|---|
| Height | 12.9 mm |
| Width | 55.4 mm |
| Depth | 14.6 mm |

### Sustainability

| Feature | Value |
|---|---|
| Sustainability certificates | RoHS |

### Features

| Feature | Value |
|---|---|
| Product colour | Metallic |

## FAQ

### How much does the SFP transceiver TP-Link TL-SM321B cost, and is it available for purchase?

The price is 14.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 116 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 30.06.2026 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. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: interface type, maximum data transfer rate, product colour, 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 SFP transceiver TP-Link TL-SM321B?

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.

## Image

https://aio.lv/img/cache/product/3593825/54592293_large.webp