Once problems arise on-site with the optical modules customized by batch coding, many people's first reaction is to return the entire batch. In fact, there is a more efficient path for after-sales of customized modules. The key lies in delimitation and vouchers.

The first level of delimitation: identification problem, performance problem or optical path problem

• If the port is not recognized or the log keeps warning: first suspect the match between the code pattern and the firmware version, and bring the complete log to the supplier for comparison with the template;
• The identification is normal but the transmitting and receiving light exceeds the limit: check the link attenuation, end face cleaning and jumpers. The module itself may not be faulty;
• DDM readings are distorted or all zero: the diagnostic area may have been rewritten, read back the code to confirm;
• Abnormal readings on short-distance multimode links, such asSFP+ 10G multi-mode dual-fiber optical module: 80% of the cases are end face contamination. Clean and retest before discussing repairs.

The most useful after-sales voucher is the batch number and correspondence table

The batch number on the label of the customized code writing module and the correspondence table of the coding test included with the shipment are the core of the sales backend: the batch number can be used to check the code pattern written in the batch and the factory-measured transceiver and DDM values. After comparing it with on-site symptoms, it can quickly distinguish code pattern problems, hardware aging, or link environment changes. Retaining the original packaging labels and taking a photo of the port log before disconnecting can significantly speed up the process.

Rewriteable faults do not require replacement of the entire unit

Problems caused by the identification area and alarm area can be solved by rewriting the code. When the brand of the upper-layer switch changes, the same batch of modules can also be rewritten and reused without scrapping; only the optical components themselves need to be replaced if they deteriorate. The EB-LINK customized coding module supports brand change and rewriting, and technical support responds within working days to assist with remote demarcation.

By putting delimitation first, the after-sales service of customized coding modules is faster than that of standard products. If you encounter compatibility problems, you can call 0755-83179002 and provide the batch number to retrieve the original test records.