Optical Fiber; Concepts - HP 7500 Series Installation Manual

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

CAUTION:
Use the same types of transceiver modules, pigtail cords, patch cords, and fiber cables. If you use
single-mode optical fibers, the transceiver modules, pigtail cords, patch cords, and fiber cables must be
single-mode.
Optical fibers have been widely used 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 89 Allowed maximum tensile force and crush load
Period of force
Short period
Long term

Concepts

Optical fiber cable
An optical fiber cable is a bundle of optical fibers. The optical fiber elements are typically individually
coated with plastic layers and contained in a protective tube. Optical fiber cables fall into single-mode
and multi-mode.
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 by interface type. Typical lengths of patch cords
include 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), and 10 m (32.81 ft).
Tensile load (N)
150
80
136
Crush load (N/mm)
500
100