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Because 24 10/100/1000Base-T ports of 24 SWITCH support the MDI/MDIX
self-identification of the cable, 24 SWITCH can adopt five types of
direct-through/cross network cables when it connects other Ethernet terminals.
Figure 3-8 Connecting the 1000M Base-T port and other Ethernet terminals
No.
Pin name
Abbr.
Remarks
1
Sending the normal phase of the data
TXD1+
Output
2
Sending the paraphase of the data
TXD1-
Output
3
Receiving the normal phase of the data
RXD1+
Input
4
Sending the normal phase of the data
TXD2+
Output
5
Sending the paraphase of the data
TXD2-
Output
6
Receiving the normal phase of the data
RXD1-
Input
7
Receiving the normal phase of the data
RXD2+
Input
8
Sending the paraphase of the data
RXD1-
Input
Table 3-1 Pins of gigabit RJ45
The direct-through or cross network cable has the function of auto-identification, so the five
classes of direct-through/cross network cables can be used to connect other Ethernet devices.
3.4 Checking After Installation
Before electrically starting up the switch, perform the following checkups after the
switch is installed:
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