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Chapter 5
| Network Connections
How to Connect to the RJ-45 Port
1000BASE-T Pin
Assignments
Table 4: 10/100BASE-TX MDI and MDI-X Port Pinouts
Pin
MDI Signal Name
1
Transmit Data plus (TD+)
-52V power (Negative V
2
Transmit Data minus (TD-)
-52V power (Negative V
3
Receive Data plus (RD+)
GND (Positive V
port
4
-52V power (Negative V
5
-52V power (Negative V
6
Receive Data minus (RD-)
GND (Positive V
port
7
GND (Positive V
port
8
GND (Positive V
port
a.
The "+" and "-" signs represent the polarity of the wires that make up each wire pair.
All 1000BASE-T ports support automatic MDI/MDI-X operation, so you can use
straight-through cables for all network connections to PCs or servers, switches or
hubs.
The table below shows the 1000BASE-T MDI and MDI-X port pinouts. These ports
require that all four pairs of wires be connected. Note that for 1000BASE-T
operation, all four pairs of wires are used for both transmit and receive.
a
MDI-X Signal Name
Receive Data plus (RD+)
)
GND (Positive V
port
Receive Data minus (RD-)
)
GND (Positive V
port
Transmit Data plus (TD+)
)
-52V power (Negative V
)
GND (Positive V
port
)
GND (Positive V
port
Transmit Data minus (TD-)
)
-52V power (Negative V
)
-52V power (Negative V
)
-52V power (Negative V
– 38 –
)
port
)
port
)
port
)
port
)
port
)
port
)
port
)
port
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