Appendix Inspecting and Cleaning
Optical Fiber Connectors and Adapters
Since the 50G optical module link uses the PAM4 encoding technology,
there are higher requirements on the optical fiber and cable quality and
the link is more sensitive to multipath reflection interference of signals.
If the fiber link connector, fiber section, or fiber splicing surface is dirty,
optical signals are reflected back and forth on the fiber link, causing
interference due to co-channel noise on the receive side. As a result, the
optical link is unstable or intermittently disconnected.To prevent this
issue, you need to check and clean the optical fiber connectors before
installation. For details, see Installation and maintenance > Preparing
for the installation> Inspecting and Cleaning Optical Fiber Connec-
tors and Adapters in the product documentation.
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