Optical module will go through strict testing and quality inspection procedures before shipment, such as material testing, parameter testing, aging testing, real machine testing, end-face testing, etc. The detection frequency shouldn't be too frequent within short period of time. Can't direct touch the optical module by hand. We should wear anti-static gloves, anti-static clothing and anti-static wrist strap. The module can't be placed on the worktable without ESD protection measure. Don't. Quick reference for interpreting Digital Optical Monitoring (DOM) values on fiber optic modules (SFP, SFP+, QSFP, etc), identifying acceptable, caution, and unacceptable levels, and general issue troubleshooting examples. If the optical module is installed on a GE port, run the display interfaceGigabitEthernet x/x/x command to view port information when the optical module. A finished optical module, in order to ensure the quality of the product, must go through a number of steps of testing before shipping. Dirty optical module can cause erroneous error reports, resulting in the unnecessary replacement of a module costing upwards of $150-$800.
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