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Troubleshooting Guide

CloudEngine 16800, 12800, 12800E, 8800, 7800, 6800, and 5800 Series Switches

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How Do I Select Optical Modules and Fibers?

How Do I Select Optical Modules and Fibers?

Optical modules work with optical fibers to transmit optical signals. An optical module works in full-duplex mode with a pair of optical fibers, one for transmission and one for receiving, as shown in the following figure.

Both optical modules and fibers support two modes: single mode and multimode. The following table describes mapping between optical modules and fibers.

Optical Module

Optical Fiber

Working Status

Single-mode optical module

Single-mode optical fiber

Work normally

Single-mode optical module

Multimode optical fiber

Can work in a short term

Multimode optical module

Multimode optical fiber

Work normally

Multimode optical module

Single-mode optical fiber

Cannot work

Updated: 2020-01-07

Document ID: EDOC1000060766

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