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Pigtail cord
A pigtail cord is an optical fiber that has an optical connector on one end and a length of exposed fiber
on the other. The end of the pigtail is fusion spliced to a fiber, connecting the fiber cable and transceiver.
Pigtail cords fall into single-mode (yellow) and multi-mode (orange), and can also be classified into SC,
LC, FC, and so on based on interface type.
Fiber connector
Fiber connectors are indispensable passive components in an optical fiber communication system. They
allow the removable connection between optical channels, which makes the optical system debugging
and maintenance more convenient and the transit dispatching of the system more flexible.
Figure 60 SC connector
Figure 61 LC connector
Usage guidelines
Follow these guidelines when you connect an optical fiber:
• Make sure the fiber connector and fiber type match the transceiver module type.
• The fiber interfaces on some cards of the 7500 Switch Series have shielded covers. Remove the
shielded covers before using the fiber interfaces. Fiber interfaces must be installed with shielded
covers when they are not in use. Keep them safely.
• Fiber connectors must be protected under safe and reliable outer packing, and be fitted with dust
caps. Fiber connectors must be installed with dust caps when they are not in use. Take care not to
scratch their end face. Replace the dust cap if it is loose or polluted.
• Before connecting a fiber, use dust free paper and absolute alcohol to clean the end face of the
fiber connector. You can brush the end face only in one direction. You also need to brush the end
face of the fiber port.
• Never bend or curve a fiber when connecting it. After a fiber is installed well, the bend radius must
be not less than 40 mm (the minimum dynamic bend radius is 20 D, and the minimum static bend
radius is 10 D. D indicates the outer diameter of dust caps).
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