7
•
Crossover cables connect devices of the same type—for example, switch
to switch, router to router, and PC to PC.
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.
