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.

1 TD+

2 TD_

3 RD+

4

5

6 RD_

7

8

1 2 3 4 5 6 7 8

Figure A-1RJ-45 Connector Pin Assignments

Page 55
Image 55
3Com XLPCI manual RJ-45 Connector Pin Assignments, 10BASE-T Specifications