Installation Manual
H3C SecPath V1000-A Security Gateway
Chapter 8 Multifunctional Interface Modules
8-7
RJ45
Signal
Category-5
twisted-pair
cable
Direction of
signal
RJ45
7 –– White
(brown)
–– 7
8 –– Brown
–– 8
Table 8-4
Crossover cable pinout
RJ45
Direction of
signal
Category-5
twisted-pair
cable
Direction of
signal
RJ45
1 TX+
White
(orange)
Æ
3
2 TX-
Orange
Æ
6
3 RX+
White
(green)
Å
1
4 –– Blue
–– 4
5 –– White
(blue)
–– 5
6 RX-
Green
Å
2
7 –– White
(brown)
–– 7
8 –– Brown
–– 8
Ethernet cables are divided into two categories: straight-through and crossover.
z
Straight-through cable: The sequences of the twisted pairs crimped in the RJ-45
connectors at both ends are the same. It connects a terminal device (PC or router)
to a HUB or LAN Switch.
z
Crossover cable: The sequences of the twisted pairs crimped in the RJ-45
connectors at both ends are different. It connects a terminal device (PC or router)
to another terminal device. You make crossover cables by yourself.
Note:
In making network cables, shielded cables are preferred for the sake of
electromagnetic compatibility.