# SFP optical module MaxLink ML-S31D-3 single-mode 1310nm 3 km

**URL:** https://aio.lv/en/product--maxlink-ml-s31d-3--10732606
**Data updated:** 2026-02-12 22:04 (EET)
**Category:** Network Media Converters
**Manufacturer:** MaxLink
**Manufacturer code:** ML-S31D-3
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

SFP optical module MaxLink ML-S31D-3 is a single‑mode transceiver operating at 1310 nm with a transmission range up to 3 km. Designed for insertion into SFP ports, it enables fiber uplinks between switches, routers or media converters. Typical uses include enterprise and ISP networks where short metro or access links are required. Provides compact, hot‑pluggable fiber connectivity.

## Long description

The SFP optical module MaxLink ML-S31D-3 single-mode 1310nm 3 km is a compact, hot-pluggable fiber transceiver designed for use in devices with SFP ports. It operates on a 1310 nm wavelength over single-mode fiber and supports point-to-point optic links with a specified reach up to 3 km. The module enables fiber uplinks between switches, routers and media converters in enterprise, campus and service provider access networks, providing straightforward fiber connectivity where short metro or access links are required.
Advantages
The MaxLink ML-S31D-3 offers a small form factor compatible with standard SFP slots, hot‑swappable convenience for minimal maintenance downtime and single‑mode 1310 nm operation suited to short-range fiber links up to 3 km. Its straightforward design focuses on interoperability with networking equipment that accepts SFP transceivers and on providing reliable optical uplinks without the need for external power or configuration.
Suitable for
 Connecting switches and routers over single‑mode fiber in access and metro segments
 Fiber uplinks between network closets and aggregation points
 Replacing or expanding SFP-based ports in enterprise and ISP equipment
Key specifications
 Optical type: single‑mode fiber
 Wavelength: 1310 nm
 Maximum transmission distance: up to 3 km
 Form factor: SFP (small form‑factor pluggable)
 Connector type: standard fiber SFP receptacle (LC compatible with SFP adapters)
 Hot‑pluggable: yes
How to use
Shut down or follow the host device’s hot‑swap procedure as recommended by the equipment manufacturer, insert the MaxLink ML-S31D-3 into an available SFP port until it seats firmly, and connect single‑mode fiber using appropriate LC patch cables or pigtails. Confirm link status on the host device and verify optical link parameters via the device management interface if available. For replacement, remove the existing transceiver according to the host’s instructions and insert the new module while the device supports hot swapping.
Usage recommendations
Use clean single‑mode fiber connectors and verify fiber polarity and attenuation for reliable performance. Keep the transceiver dust caps on when not connected, avoid mechanical stress on fiber cables near the connector, and ensure the host equipment supports standard SFP modules operating at 1310 nm for compatibility.

## FAQ

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### 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

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