SMC Networks SMC TigerCard 10G - Manual (Page 64)

C
ABLES
B-2
10BASE-T/100BASE-TX Pin Assignments
Use unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for
RJ-45 connections: 100-ohm Category 3 or better cable for 10 Mbps
connections, or 100-ohm Category 5 or better cable for 100 Mbps or
1000 Mbps connections. Also be sure that the length of any twisted-pair
connection does not exceed 100 meters (328 feet).
The RJ-45 ports on the switch base unit support automatic MDI/MDI-X
operation, so you can use straight-through cables for all network
connections to PCs or servers, or to other switches or hubs. 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.
Straight-Through Wiring
If the twisted-pair cable is to join two ports and only one of the ports has
an internal crossover (MDI-X), the two pairs of wires must be
straight-through. (When auto-negotiation is enabled for any RJ-45 port on
this switch, you can use either straight-through or crossover cable to
connect to any device type.)
Table B-1 10/100BASE-TX MDI and MDI-X Port Pinouts
Pin MDI Assignment MDI-X Assignment
1 Output Transmit Data + Input Receive Data +
2 Output Transmit Data - Input Receive Data -
3 Input Receive Data + Output Transmit Data +
6 Input Receive Data - Output Transmit Data -
4,5,7,8 Not used Not used
Note: The “+” and “-” signs represent the polarity of the wires that
make up each wire pair.