H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 68)

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If an RJ-45 Ethernet port is enabled with MDI/MDIX autosensing, it can
automatically negotiate pin roles.
NOTE:
The RJ-45 Ethernet ports on the WX3010E wireless switch support
MDI/MDIX autosensing.
Making an Ethernet twisted pair cable
To make an Ethernet twisted pair cable:
1. Cut the cable to a proper length with the crimping pliers.
2. Strip off an appropriate length of the cable sheath. The length is typically
that of the RJ-45 connector.
3. Untwist the pairs so that they can lay 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. Use a cable tester to verify the connectivity of the cable.
Optical fiber
Optical fibers feature low loss and long transmission distance.
Optical fibers can be classified into single mode fibers and multi-mode
fibers. A single mode fiber (with yellow jacket) carries only a single ray of
light; a multi-mode fiber (with orange jacket) carries multiple modes of
lights.
Table 23 Characteristics of single mode and multi-mode optical fibers
Item Single mode fiber Multi-mode fiber
Core
Small core (10 micrometers
or less)
Larger core than single mode
fiber (50 micrometers, 62.5
micrometers or greater)