# Network transceiver module TP-LINK TL-SM321A SFP fiber optic 1250 Mbit/s

**URL:** https://aio.lv/en/product--tp-link-tlsm321a--4824642
**Data updated:** 2026-03-11 11:48 (EET)
**Category:** Network Transceiver Modules
**Manufacturer:** TP-LINK
**Manufacturer code:** TLSM321A
**EAN:** 0845973030513
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 23.49 €
**Prices and availability valid until:** 2026-07-10 23:59
**Price without VAT (21%):** 19.41 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tp-link-tlsm321a--4824642

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.99 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

TP-LINK TL-SM321A is an SFP fiber optic transceiver module supporting a maximum data transfer rate of 1250 Mbit/s. Designed for insertion into SFP ports, it enables optical uplinks and link extension in switches, routers and media converters. Suitable for short to mid-range fiber connections where SFP form factor and 1.25 Gbit/s-class throughput are required.

## Long description

TP-LINK TL-SM321A is an SFP fiber optic transceiver module that supports a maximum data transfer rate of 1250 Mbit/s. Designed to plug into standard SFP ports, this small form-factor pluggable module enables optical uplinks and link extension in switches, routers and media converters. The TL-SM321A implements 1000Base-BX single-strand transmission, using different wavelengths for transmit and receive, and can reach distances up to 10 km when paired with compatible WDM modules.
Advantages
The module is compliant with SFP form-factor conventions and supports 1.25 Gbit/s-class throughput, providing a compact and hot-pluggable solution for fiber connectivity. Single-strand WDM operation reduces cabling requirements by allowing bidirectional transmission over one fiber. Compatibility with common network devices makes it suitable for upgrading Ethernet ports to optical links without major infrastructure changes.
Suitable for
 Optical uplinks between switches and routers
 Link extension for data centers and enterprise networks
 Media converters and access aggregation points
 Short to mid-range fiber runs up to 10 km
Key specifications
 Form factor: SFP (Small Form-factor Pluggable)
 Standard: 1000Base-BX (single-strand WDM)
 Maximum data transfer rate: 1250 Mbit/s
 Transmission distance: up to 10 km (pairing with compatible WDM module)
 Optical interface: single-fiber bidirectional (separate transmit and receive wavelengths)
 Hot-pluggable design for easy installation
How to use
Insert the TL-SM321A into an available SFP port on your switch, router or media converter while the device is powered down or following the vendor's hot-plug guidelines. Use a compatible WDM module or a paired TL-SM321A on the far end to establish a bidirectional single-fiber link. Verify link status through the host device's interface and ensure the transmit and receive wavelengths are correctly matched between the two endpoints. Follow standard ESD precautions when handling the transceiver.
Usage recommendations
For reliable operation, pair the TL-SM321A with compatible WDM modules or the same model on the remote end, keep fiber connectors clean, and confirm device compatibility with your switch or router vendor. Use proper fiber patch cables and maintain bend radii to preserve signal quality over distances up to 10 km.

## Specifications

### Performance

| Feature | Value |
|---|---|
| Interface type | SFP |
| Maximum data transfer rate | 1250 Mbit/s |
| Networking standards | IEEE 802.3z |
| Fiber ethernet cabling technology | 1000BASE |
| Fiber optic connector | LC (UPC) |
| Maximum transfer distance | 10000 m |
| Fiber cable diameters supported (core/cladding) | 9/125 |
| Wavelength-division multiplexing (WDM) | Yes |
| Multi-mode fiber (MMF) supported | No |
| Single-mode fiber (SMF) supported | Yes |
| SFP transceiver standard | BX |

### Network

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

### 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 |

### Sustainability

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

## FAQ

### How much does the TP-LINK TL-SM321A SFP fiber transceiver 1250 Mbit/s cost, and is it available for purchase?

The price is 23.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 18 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 02.07.2026 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, 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.

## Image

https://aio.lv/img/cache/product/4824642/54594032_large.webp