D-Link 1824i User Guide - Page 84

Crossover Cable

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10BASE-T Stackable Hubs 2 RD- (receive) 3 TD+ (transmit) 4 5 6 TD- (transmit) 7 8 TD- (transmit) RD+ (receive) Not used Not used RD- (receive) Not used Not used Workstation (MDI) 1 TD+ 2 TD- 3 RD+ 6 RD- Hub (MDI-X) RD+ 1 RD- 2 TD+ 3 TD- 6 Figure D-2 Straight-through Cable 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) Hub (MDI-X) 1 RD+ 2 RD- RD+ 1 RD- 2 3 TD+ 6 TD- TD+ 3 TD- 6 Figure D-3 Crossover Cable D-2 Cables and Connectors

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10BASE-T Stackable Hubs
D-2
Cables and Connectors
2
RD- (receive)
TD- (transmit)
3
TD+ (transmit)
RD+ (receive)
4
Not used
5
Not used
6
TD- (transmit)
RD- (receive)
7
Not used
8
Not used
TD+
RD+
1
1
3
3
6
6
RD+
TD+
TD-
RD-
RD-
TD-
2
2
Workstation (MDI)
Hub (MDI-X)
Figure D-2
Straight-through Cable
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:
RD+
RD+
1
1
3
3
6
6
TD+
TD+
RD-
RD-
TD-
TD-
2
2
Hub (MDI-X)
Hub (MDI-X)
Figure D-3
Crossover Cable