SMC Networks SMC-EZ109DT - Manual (Page 24)

C
ABLES
12
RJ-45 Connector Pin 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.
10BASE-T/100BASE-TX Pin Assignments
An Ethernet or Fast 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.
Because all ports on this switch support automatic MDI/MDI-X
operation, 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. The table below shows the 1000BASE-T MDI and
MDI-X port pinouts.
Pin MDI-X Signal Name MDI Signal Name
1
2
3
6
4, 5, 7, 8
Receive Data plus (RD+)
Receive Data minus (RD-)
Transmit Data plus (TD+)
Transmit Data minus (TD-)
Not used at 10/100 Mbps
Transmit Data plus (TD+)
Transmit Data minus (TD-)
Receive Data plus (RD+)
Receive Data minus (RD-)
Not used at 10/100 Mbps