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Cables
Figure B-1 illustrates how the pins on the RJ-45 connector are numbered. Be sure to
hold the connectors in the same orientation when attaching the wires to the pins.
10BASE-T/100BASE-TX Pin Assignments
With 100BASE-TX/10BASE-T cable, pins 1 and 2 are used for transmitting data, and
pins 3 and 6 for receiving data.
RJ-45 Pin Assignments
Pin Number
1
2
3
6
1: The "+" and "-" signs represent the polarity of the wires
that make up each wire pair.
Because all ports on this switch support automatic MDI/MDI-X operation, you can
use straight-through cables for all network connections to PCs or servers, or to other
switches or hubs. In straight-through cable, pins 1, 2, 3, and 6, at one end of the
cable, are connected straight through to pins 1, 2, 3 and 6 at the other end of the
cable. The table below shows the 10BASE-T/100BASE-TX MDI and MDI-X port
pinouts.
Pin
1
Input Receive Data +
2
Input Receive Data -
3
Output Transmit Data +
6
Output Transmit Data -
No other pins are used.
B-2
Figure 2-1. RJ-45 Connector Pin Numbers
Assignment
Tx+
Tx-
Rx+
Rx-
MDI-X Assignment
1
MDI Assignment
Output Transmit Data +
Output Transmit Data -
Input Receive Data +
Input Receive Data -
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