Table of Contents
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June 30, 2006
MDI Pin Number
MDI-X Pin Number
1
3
2
6
3
1
4
4
5
5
6
2
7
7
8
8
case
case
a.NC = no connection.
Figure 2-1
shows the pin-outs for straight-through and cross-connect cabling.
(data network device)
(data network device)
SG1-UM-8500-03
Table 2-1. RJ-45 Pin-Outs
Transmit Data (+)
Transmit Data (-)
Receive Data (+)
NC
NC
Receive Data (-)
NC
NC
Chassis Ground
Straight-through cable
MDI-X port
Cable jack
3
Transmit
6
1
Receive
2
MDI port
Cable jack
3
Receive
6
1
Transmit
2
Figure 2-1. Straight-Through and Cross-Over Cable Pin-Outs
a
Signal
TX+ (TX0+)
TX-(TX0-)
RX+(TX1+)
(TX2+)
(TX2-)
RX-(TX1-)
(TX3-)
(TX3+)
Cable jack
3
3
6
6
1
1
2
2
Cross-over cable
Cable jack
3
3
6
6
1
1
2
2
Chapter 2: Installation
Symbol
Direction
Out(Bidirect)
Out(Bidirect)
In(Bidirect)
(Bidirect)
(Bidirect)
In(Bidirect)
(Bidirect)
(Bidirect)
MDI port
(management card)
3
Receive
6
1
Transmit
2
MDI port
(management card)
3
Receive
6
1
Transmit
2
2-3
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