Rj-45 Ports - Allied Telesis AT-8600 Hardware Reference Manual

16
C613-03080-00 REV G

RJ-45 Ports

For 10BASE-T/100BASE-TX connections, a twisted pair cable must be used.
Each pair is identified by two different colours. For example, one wire might be
red, and the other red with a white stripe. An RJ-45 connector must be fitted to
both ends of the cable. The following figure shows the pin layout for RJ-45
connectors.
Figure 4: RJ-45 pin layout
With 10BASE-T/100BASE-TX cables, pins 1 and 2 are used for transmitting
data, while pins 3 and 6 are used for receiving data. The following table lists
the 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.
If a twisted pair cable is to join two ports and only one of the ports has an
internal crossover, the two pairs must be straight through, as listed in the
following table.
End 1
1 (TX+)
2 (TX-)
3 (RX+)
6 (RX-)
If a twisted pair cable is used to join two ports and either both ports are
labelled with an "X" or neither port is labelled with an "X", a crossover must be
included in the wiring. The following table lists the RJ-45 crossover wiring pin
assignments.
End 1
1 (TX+)
2 (TX-)
3 (RX+)
6 (RX-)
8
8
1
1
1
Assignment
TX+
TX-
RX+
RX-
End 2
1 (TX+)
2 (TX-)
3 (RX+)
6 (RX-)
End 2
3 (TX+)
6 (TX-)
1 (RX+)
2 (RX-)
AT-8600 Series
RJPIN