# MaxLink 1.25G SFP Optical Module ML-S3155-3 WDM BiDi Single-Mode Tx 1310/Rx1550nm 3km LC DDM

**URL:** https://aio.lv/en/product--maxlink-ml-s3155-3--11391743
**Data updated:** 2026-08-09 04:23 (EEST)
**Category:** Network Media Converters
**Manufacturer:** MaxLink
**Manufacturer code:** ML-S3155-3
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

MaxLink 1.25G SFP optical module model ML-S3155-3 designed for high-speed fiber optic communications. Features WDM BiDi technology, single-mode support, transmission wavelength Tx 1310nm and reception Rx 1550nm, operating range up to 3km, equipped with 1x LC connector and DDM diagnostic monitoring.

## Long description

The MaxLink 1.25G SFP optical module model ML-S3155-3 is a reliable transceiver designed for high-speed fiber optic communication networks. It facilitates seamless data transmission over single-mode fiber infrastructure, making it an efficient solution for enterprise networks, data centers, and telecommunication links. Equipped with advanced WDM BiDi technology, this module enables simultaneous data transmission and reception over a single optical fiber strand, optimizing available network bandwidth and infrastructure costs.
Advantages
This SFP module provides efficient WDM BiDi bidirectional communication over a single fiber strand, which significantly reduces cabling complexity and deployment expenses. The inclusion of Digital Diagnostics Monitoring (DDM) allows network administrators to monitor critical operational parameters in real time, ensuring high reliability and proactive maintenance. With a data rate of 1.25 Gbps and a transmission range of up to 3 kilometers, it delivers stable and consistent performance for short-to-medium distance fiber connections.
Suitable for
Connecting switches and routers in enterprise local area networks
Extending network reach across corporate campuses up to 3 kilometers
Telecommunication applications requiring single-fiber BiDi transmission
Data center interconnections using LC fiber cabling
When it may not be suitable
This optical module is not designed for multi-mode fiber optic cabling infrastructures and will not function correctly without compatible single-mode fiber. It is also not suitable for long-distance transmissions exceeding 3 kilometers or for networks that require data rates significantly higher than 1.25 Gbps.
Key specifications
Data transfer rate of 1.25 Gbps
WDM BiDi bidirectional technology
Single-mode fiber compatibility
Transmitter wavelength of 1310 nm
Receiver wavelength of 1550 nm
Maximum operating distance of 3 km
Single LC optical connector
Digital Diagnostics Monitoring (DDM) supported
How to use
Ensure that the networking device is powered off before handling the optical module. Gently insert the SFP transceiver into the designated slot on your switch, router, or media converter until it clicks securely into place. Connect the appropriate single-mode fiber optic cable with an LC connector to the module port. Power on the network device and verify the link status and transceiver parameters through the network management interface utilizing the DDM functionality.
What to consider before purchase
Verify compatibility with your existing network hardware and switches
Confirm that your cabling infrastructure utilizes single-mode fiber
Check that the paired network device uses matching BiDi wavelengths such as Tx 1550/Rx 1310 nm
Ensure the required transmission distance does not exceed 3 kilometers
Always handle optical modules with ESD safety precautions, keep dust caps attached when not in use to prevent optical contamination, and ensure wavelength pairing matches the opposing transceiver.

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. 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/11391743/66032564_large.webp