Every optical module of ETU-LINK Optical Communication carries the confidence of "factory-quality"! In the field of communication equipment, the quality of optical modules is directly related to the stability and security of the entire communication link. We always regard the testing link as the core of quality control, using strict standards and comprehensive guarantees to ensure that every customer can choose with peace of mind. Want to know how we maintain quality control? The four major test guarantees will explain it to you in detail .

✅ 3-year Extended Warranty: We Dare to Promise and Dare to Responsible

For precision electronic components like optical modules, the warranty period is often a direct reflection of confidence in their quality. Our commitment to a three-year warranty stems from our absolute control over the entire product process, from R&D to production. From the moment it leaves the factory, every module is covered by our comprehensive quality assurance system, like a layer of solid "armor."

When choosing ETU-LINK optical modules, if you encounter any non-human quality problems during the three-year warranty period, our after-sales team will respond immediately and complete the diagnosis, troubleshooting and replacement efficiently and professionally throughout the process, eliminating users' worries.

✅ 100% Full-Process Testing: No Detail Overlooked

Common parameter testing: Calibrate core indicators such as optical power, receiving sensitivity, voltage and current one by one;

Real fiber testing: Real link environment to ensure stable signal transmission without packet loss;

Switch testing: Connect to mainstream brand equipment to verify protocol compatibility and long-term operational reliability.

✅ Multi-national Certification For Maximum Compliance

In a globalized market, product compliance is the "passport" to enter markets across different countries and regions, and various certifications are authoritative recognition of product compliance. Our optical modules have passed multiple international certifications, including CE, FCC, and RoHS. Each certification signifies that our products meet stringent standards in multiple dimensions.

These certifications are not just a certificate, but also our core guarantee of quality . Whether exported to overseas markets or used domestically, they can ensure the compliance of the products, so you don’t have to worry about product access issues.

✅ Sample Testing Available

When purchasing communications equipment, many customers worry about optical modules not being compatible with their equipment, potentially impacting overall system performance. To address this concern, we offer a sample testing service, allowing you to experience product performance firsthand before committing to bulk purchases. Simply submit an application, go through a simple review process, and receive a sample for testing. During this testing period, you can thoroughly verify the module's performance, including signal transmission speed, stability, and compatibility, to ensure it perfectly fits your equipment .

Each module of ETU-Link has gone through such a rigorous testing process to ensure a 100% factory qualification rate. Quality is not just an empty slogan, but is reflected in the visible testing process and the promised after-sales guarantee.

ETU-Link optical modules always safeguard communication links with professional testing standards and a rigorous attitude. Whether in data centers, security monitoring, or telecommunications operations, choosing us means choosing stable and reliable communication guarantees.