H3C Technologies H3C SecPath U200-A U200-M U200-S User Manual
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Optical fibers are widely used in fiber-optic communications, which are advantageous for long-distance
communications.
Optical fibers can be classified into the following types:
•
Single mode fiber—It has a core size of 10 μm or smaller, and has a lower modal dispersion. It
carries only a single ray of light. It is mostly used for communication over longer distances.
•
Multi-mode fiber—It has a core size of 50 μm or 62.5 μm or higher, and has a higher modal
dispersion than single-mode optical fiber. It is mostly used for communication over shorter
distances.
Table 34 Allowed maximum tensile force and crush load
Period of force
Tensile load (N)
Crush load (N/mm)
Short period
150
500
Long term
80
100
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. The UTM
device supports only the LC connector.
Figure 59 LC connector
(1) LC connector
(2) Optical fiber
1
2