SAGEM 3P@C
1.1.1.49Preparing the network cables
A Category 5 twisted pair is made up of 8-core thin wires. They are identified into groups by the color of the external insulation layer of the thin wires. In general, a single color and a single color plus white are used to identify a twisted pair, or color dots are sometimes used for paired identification. According to this method of identification, the eight-core thin wires of a Category 5 twisted pair can be divided into four pairs: Orange & orange/white, blue & blue/white, green & green/white, brown & brown/white.
Usually there are two kinds of Ethernet cables connecting the two Ethernet devices: Straight-through cable and crossover cable. Figures 4-39 and 4-40 show respectively the connection methods of a straight-through cable and a crossover cable. Selection shall be based on the application requirements. In the figures, "SIDE1" and "SIDE2" indicate the two ends of the network cable respectively while numbers "1 ~ -8" represents the line sequence at the two ends.
Figure 4-39 Illustration of making a straight-through cable
Pinouts of a straight-through cable | Illustration | |
| |
| Orange/white | Orange/white |
| Orange | Orange |
| Green/white | Green/white |
| Blue | Blue |
| Blue/white | Blue/white |
| Green | Green |
| Brown/white | Brown/white |
| Brown | Brown |
Figure 4-40 Illustration of making a crossover cable | | |
Pinouts of a crossover cable | Illustration | |
| Orange/white | Green/white |
| Orange | Green |
| Green/white | Orange/white |
| Blue | Blue |
| Blue/white | Blue/white |
| Green | Orange |
| Brown/white | Brown/white |
| Brown | Brown |
1.1.1.50Ethernet interface connection
Connect one end of the twisted pair that uses RJ-45 connectors at both ends to the Ethernet interface of the SMUB, and the other end to the Ethernet interface of the other Ethernet-compatible device in the LAN, as shown in Figure 4-41:
3P@C Installation Manual
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