H3C Technologies H3C S12500-X Series Switches - Manual (Page 130)

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Patch cord
A fiber that has connectors at both ends is called a patch cord. A patch cord connects one optical device
to another for signal routing. Patch cords fall into single-mode and multi-mode patch cords.
• Single-mode patch cord—The jacket is yellow. It permits transmission over longer distances.
• Multi-mode patch cord—The jacket is orange. It permits transmission over shorter distances.
Patch cords are classified into SC, LC, FC, and so on based on interface type. The length of a patch cord
can be 0.5 m (1.64 ft), 1 m (3.28 ft), 2 m (6.56 ft), 3 m (9.84 ft), 5 m (16.40 ft), 10 m (32.81 ft), and so
on.
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 70 MPO connector
Figure 71 LC connector
Precautions
• Make sure the fiber connector and fiber type match the transceiver module type.
• The fiber ports on some cards have dust covers. Remove the dust covers before using the fiber ports.
Fiber interfaces must be installed with dust covers when they are not in use. Keep them safely.