User's Manual

B
Appendix
UTP Cable
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, P2 at the hub connects to Pin 2 at the server, and so
on. Figure A-1 show the locations of pins on a standard RJ-45 plug on a twisted-pair cable.
Table a-1 show 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-

1
2
TD+
TD-
2 3
6
RD+
RD-

3
6
RD+
RD-