3Com XL PCI 10 - Manual (Page 55)

RJ-45 Connector Pin Assignments A-3
10BASE-T Specifications
The 10BASE-T name indicates a signaling speed of
10 Mbps and twisted-pair wiring. Base stands for
baseband, which denotes a technique for transmitting
signals as direct-current pulses rather than modulating
them onto separate carrier frequencies.
A wiring topology using 10BASE-T specifies a wiring hub,
cable arranged in a star configuration, and unshielded
twisted-pair cable. Each node has a separate cable run that
must not exceed 100 meters (328 ft) from the node to
the hub.
RJ-45 Connector Pin Assignments
Figure A-1 shows the RJ-45 connector pin assignments for
the 3C900B NIC.
Figure A-1 RJ-45 Connector Pin Assignments
1 2 3 4 5 6 7 8
1
2
3
4
5
6
7
8 TD+
TD_
RD_
RD+