# TP-Link TL-SM321A Network Transceiver Gigabit Single-Mode WDM Bi-Directional SFP Module

**URL:** https://aio.lv/en/product--tp-link-sm321a-2--10851037
**Data updated:** 2026-10-23 22:07 (EEST)
**Category:** Network Equipment Accessories
**Manufacturer:** TP-LINK
**Manufacturer code:** SM321A-2
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 17.99 €
**Prices and availability valid until:** 2026-12-01 23:59
**Price without VAT (21%):** 14.87 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tp-link-sm321a-2--10851037

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.11.2026 | free |
| Pickup points | 12.11.2026 | 1.99 EUR |
| Courier delivery to door | 12.11.2026 | 4.99 EUR |

## Summary description

The TP-Link TL-SM321A is a Gigabit single-mode WDM bi-directional SFP transceiver module designed for high-speed fiber optic network connections. It provides reliable data transmission over long distances for switches and routers, making it ideal for enterprise networks, data centers, and telecommunication infrastructures seeking efficient network expansion and stable connectivity.

## Long description

The TP-Link TL-SM321A Network Transceiver Gigabit Single-Mode WDM Bi-Directional SFP Module is designed for high-speed fiber optic network connections. It provides reliable data transmission over long distances for compatible network switches and routers, ensuring stable and efficient communication across enterprise environments, data centers, and telecommunication infrastructures.
Advantages
This SFP transceiver module utilizes WDM bi-directional technology, which allows data to be sent and received over a single strand of fiber optic cable, effectively doubling the bandwidth capacity and reducing cabling infrastructure costs. It delivers Gigabit speeds for demanding network applications and supports long-distance single-mode fiber transmissions. Built for seamless integration with compatible TP-Link Omada and other standard network devices, it offers hot-swappable convenience for easy installation and maintenance without network downtime.
Suitable for
Expanding enterprise local area networks over long distances
Connecting remote switches and routers in data centers
Telecommunication infrastructure fiber optic connections
Upgrading existing network backbones with WDM bi-directional technology
When it may not be suitable
This module is not suitable for multi-mode fiber optic cabling setups because it is specifically engineered for single-mode fiber. Additionally, it cannot be used with standard non-WDM transceivers on the exact same fiber strand, as WDM technology requires matching paired units on both ends of the connection.
Key specifications
Gigabit data transmission speed
Single-mode fiber compatibility
WDM bi-directional technology
Standard SFP form factor
Long-distance transmission support
Hot-swappable design
How to use
To install the module, gently insert the SFP transceiver into an available SFP slot on your compatible network switch or router until it clicks securely into place. Connect the appropriate single-mode fiber optic patch cable to the module port. Ensure the network device is powered on and recognizes the transceiver before configuring the port settings according to your network requirements. Handle the optical components with care and keep dust caps attached when cables are not connected.
What to consider before purchase
Verify compatibility with your existing network switches or routers
Confirm that your cabling infrastructure uses single-mode fiber
Ensure you have the matching WDM counterpart module for the opposite end of the fiber link
Check the required transmission distance for your network deployment
Usage recommendations: Always maintain clean fiber optic connections and use dust caps when the cables are disconnected to prevent signal degradation and maintain optimal network performance.

## FAQ

### How much does the TP-Link TL-SM321A SFP Transceiver Module cost, and is it available for purchase?

The price is 17.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 41 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 09.11.2026 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. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/10851037/66026361_large.webp