Allied Telesis AT-2711 Series Adapters - Manual (Page 132)

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Overview
The fiber optic connector consists of a fiber optic plug and its adapter. The
end of the fiber optic cable is held in the core of the ferrule in the plug as
shown in Figure 71. Light signals are transmitted through the core of the
fiber.
Figure 71. Ferrule in an SC Connector Plug
Even minor smudges or dirt on the end face of the fiber, completely
invisible to the naked eye, can disrupt light transmission and lead to failure
of the component or of the entire system. Figure 72 shows part of the end
face of an unclean and clean ferrule.
Figure 72. Unclean and Clean Ferrule
Guidelines
Here are general guidelines and warnings for fiber optic connectors:
 Always keep a dust cap on a fiber optic cable when it is not in use.
 Do not touch the end face of the ferrule in the connector.
Warning
Do not stare into the laser beam.  2
Warning
Do not look directly at the cable ends or inspect the cable ends with
an optical lens.
 31
177
Ferrule
156
Unclean Clean