Crossover Cable - D-Link DE-1824EI User Manual

10BASE-T Stackable Hubs
2
3
4
5
6
7
8
Workstation (MDI)

Crossover Cable

When cascading or connecting the hub to another switch, bridge, or hub
through the UTP port, a modified crossover cable is necessary. With a
crossover cable, two pairs of wires are switched at one connector end. Carry
out the following steps to create a customized, crossover twisted-pair cable:
1.
Leave one end of the cable as is, with the RJ-45 connector intact. The
wiring at just one end of the cable needs to be modified.
2.
At the other end of the cable, connect wires 1 and 2 to contacts 3 and
6 respectively. Likewise, connect wires 3 and 6 to contacts 1 and 2.
Refer to the following diagram:
Hub (MDI-X)
D-2
RD- (receive)
TD+ (transmit)
TD- (transmit)
1 TD+
2 TD-
3 RD+
6 RD-
Figure D-2 Straight-through Cable
1 RD+
2 RD-
3 TD+
6
TD-
Figure D-3 Crossover Cable
TD- (transmit)
RD+ (receive)
Not used
Not used
RD- (receive)
Not used
Not used
Hub (MDI-X)
RD+ 1
RD- 2
TD+ 3
TD- 6
Hub (MDI-X)
RD+ 1
RD- 2
TD+ 3
6
TD-
Cables and Connectors