NEC QX-S5500 Series, Руководство по установке

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Installation Guide
QX-S5500 Series Ethernet Switches
5
Network connection of the switch
Pin 1: white, orange, pin 2: orange, pin 3: white, green, pin 4: blue, pin 5: white, blue, pin 6:
green, pin 7: white, brown and pin 8: brown
III. Type of cable
1) Performance
An Ethernet cable depends on performance, and, category 3 or 4 or 5 or 5 e, 6 or 6 A and 7,
it's classified. Category 5 cables, category 5, 5e and category 6 are generally used in the
LAN.
Table 5-1
The description of the Ethernet cable which is generally used
Type of cable Description
category 5
It's suitable for data communication by the max speed of 100Mbps with a
band margin of 100MHz.
category 5e
It's suitable for data communication by the max speed of 1000Mbps with a
band margin of 100MHz.
category 6
It's suitable for data communication by the speed higher than 1Gbps with a
band margin of 250MHz.
category 6A
It's suitable for data communication by the speed higher than 1Gbps with a
band margin of 500MHz.
2) Pin arrangement
It's possible to classify a cable of a twisted pair into a straight cable and a crossing cable by
a pinout.

A straight cable: The pin arrangement in both ends is based on the 568B standard so
that it may be indicated in Figure 5-2.
Figure 5-2 Straight cable
Straight-through cable
white/orange
orange
white/green
blue
white/blue
green
white/brown
brown
1
2
3
4
5
6
7
8
white/orange
orange
white/green
blue
white/blue
green
white/brown
brown
1
2
3
4
5
6
7
8

A crossing cable: The pin arrangement in the other end is based on the 568A standard
with the 568B standard for pin arrangement in one end so that it may be indicated in
Figure 5-3.
5-2