# SFP Optical Module MaxLink ML-S3155-20 WDM BiDi 20 km, 1x LC connector, single‑fiber

**URL:** https://aio.lv/en/product--maxlink-ml-s3155-20--6236385
**Data updated:** 2026-02-12 14:20 (EET)
**Category:** Network Media Converters
**Manufacturer:** MaxLink
**Manufacturer code:** ML-S3155-20
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 9.49 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 7.84 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--maxlink-ml-s3155-20--6236385

## 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

SFP optical module MaxLink ML-S3155-20 is a WDM BiDi transceiver designed for single‑fiber links up to 20 km. It provides a single LC connector and supports bidirectional wavelength division multiplexing on one fiber, suitable for Ethernet and fiber network extensions, media conversion and point‑to‑point connections. Compact SFP form factor allows easy installation in switches, routers and media converters.

## Long description

SFP optical module MaxLink ML-S3155-20 WDM BiDi 20 km, 1x LC connector, single‑fiber is a compact transceiver for single‑fiber bidirectional links. Designed in the standard SFP form factor, this MaxLink module enables wavelength division multiplexing over one optical fiber to transmit and receive data simultaneously. It supports point‑to‑point connections and can be installed in compatible SFP ports of switches, routers and media converters to extend fiber Ethernet links up to 20 km.
Advantages
The MaxLink ML-S3155-20 reduces fiber infrastructure needs by enabling bidirectional communication on a single fiber using WDM BiDi technology. Its SFP form factor ensures straightforward hot‑plug installation in common network devices. With support for links up to 20 km and a single LC connector, the module is suitable for compact installation scenarios where preserving fiber count and rack space is important. The design is compatible with typical Ethernet and fiber extension applications.
Suitable for
 Point‑to‑point fiber links over a single fiber
 Extending Ethernet connections between network devices up to 20 km
 Media converters and devices with SFP slots requiring WDM BiDi operation
 Network setups where minimizing fiber cabling is required
Key specifications
 Form factor: SFP (Small Form‑factor Pluggable)
 Transmission technology: WDM BiDi (bidirectional over single fiber)
 Maximum link distance: 20 km
 Connector type: 1x LC
 Fiber type: single‑fiber single‑mode (used for bidirectional WDM)
 Typical applications: Ethernet extension, media conversion, point‑to‑point links
How to use
Insert the MaxLink ML-S3155-20 module into an available SFP slot of a compatible switch, router or media converter while the device is powered on or according to the host device manual for hot‑swap operation. Connect the single LC fiber to the module and ensure the remote end uses the complementary WDM BiDi transceiver with the matching wavelengths. Configure link settings on the host devices if required by the network (for example speed and duplex settings) and verify link status via the host device's management interface or LEDs.
Usage recommendations
Use this WDM BiDi SFP module with single‑mode fiber and an appropriate mate transceiver at the remote end. Verify compatibility with the host device's SFP specifications and the required wavelength pairing for bidirectional operation. For reliable performance, follow standard fiber handling practices: keep connectors clean, avoid tight bends, and verify link quality after installation.

## FAQ

### How much does the SFP Optical Module MaxLink ML-S3155-20 cost, and is it available for purchase?

The price is 9.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 16 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 MaxLink 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 MaxLink 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/6236385/51557198_large.webp