SMC Networks SMC8002CM-US - Manual (Page 13)

Quick Installation Guide
10
Port and Cable Assignments
Caution: DO NOT plug a phone jack connector into any RJ-45 port. Use only
twisted-pair cables with RJ-45 connectors that conform with FCC
standards.
An Ethernet twisted-pair link segment requires two pairs of wires. Each wire pair is
identified by two different colors. Each wire pair must be attached to the RJ-45
connector in a specific orientation detailed below.
The Ethernet port on the modem is an MDI-X port, which allows straight-through
cable connections to PCs, and to hubs and switches with MDI ports. In
straight-through cable, pins 1, 2, 3, and 6, at one end of the cable, are connected
straight through to pins 1,2, 3 and 6 at the other end of the cable. For connection to
hubs or switches which have MDI-X ports, a cross-over cable must be used.
Pin MDI-X Signal Name MDI Signal Name
1 Receive Data plus (RD+) Transmit Data plus (TD+)
2 Receive Data minus (RD-) Transmit Data minus (TD-)
3
Transmit Data plus (TD+) Receive Data plus (RD+)
6
Transmit Data minus (TD-) Receive Data minus (RD-)
4,5,7,8 Not used at 10 Mbps Not used at 10 Mbps