User’s Manual
47
5-2. UTP Cable / RJ-45 Jack Definition
Straight through twisted pair cable is typically used to connect a hub to a server or
workstation. In a straight through connection, Pin 1 at the server, Pin 2 at the hub
connects to Pin 2 at the server, and so on. Figure A-1 shows the locations of pins on
a standard RJ-45 plug on a twisted-pair cable.
Table A-1 shows the wiring in a straight -through twisted-pair cable (Pins 4,5,7 and
8 are not used).
Twisted Pair
Number
Pin Number
Signal
Description
To
Pin
Number
Signal
Description
1
1
2
TD+
TD-
à
1
2
TD+
TD-
2
3
6
RD+
RD-
à
3
6
RD+
RD-
RJ-45 Connector Pin Assignments
Figure A-1 shows the RJ-45 Connector pin assignments