H3c-technologies H3C SecPath F5000-A5 Firewall User Manual download pdf (Page 113)

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3. Untwist the pairs so that they can lie flat, and arrange the colored wires based on the wiring

specifications.

4. Cut the top of the wires even with one another. Insert the wires into the RJ-45 end and make sure

the wires extend to the front of the RJ-45 end and make good contact with the metal contacts in the

RJ-45 end and in the correct order.

5. Crimp the RJ-45 connector with the crimping pliers until you hear a click.

6. Repeat the above steps with the other end of the cable.

7. Use a cable tester to verify the correct connectivity of the cable.

Optical fiber

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 m 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 m or 62.5 m or higher, and has a higher modal

dispersion than single-mode optical fiber. It is mostly used for communication over shorter

distances.

Table 35 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 F5000-A5

supports only the LC connector.

Figure 77 LC connector

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H3c-technologies H3C SecPath F5000-A5 Firewall User Manual Page 113