Micrel, Inc.
KSZ8041NL/RNL
Straight Cable
A straight cable connects a MDI device to a MDI-X device, or a MDI-X device to a MDI device. The Figure 4 depicts a
typical straight cable connection between a NIC card (MDI) and a switch, or hub (MDI-X).
10/100 Ethernet
Media Dependent Interface
10/100 Ethernet
Media Dependent Interface
1
1
Transmit Pair
2
Receive Pair
2
Straight
Cable
3
3
4
4
Receive Pair
5
Transmit Pair
5
6
7
8
6
7
8
Modular Connector
(RJ-45)
HUB
Modular Connector
(RJ-45)
NIC
(Repeater or Switch)
Figure 4. Typical Straight Cable Connection
Crossover Cable
A crossover cable connects a MDI device to another MDI device, or a MDI-X device to another MDI-X device. Figure 5
depicts a typical crossover cable connection between two switches or hubs (two MDI-X devices).
10/100 Ethernet
10/100 Ethernet
Media Dependent Interface
Media Dependent Interface
1
1
Crossover
Cable
Receive Pair
2
Receive Pair
2
3
3
4
4
Transmit Pair
5
Transmit Pair
5
6
7
8
6
7
8
Modular Connector (RJ-45)
HUB
Modular Connector (RJ-45)
HUB
(Repeater or Switch)
(Repeater or Switch)
Figure 5. Typical Crossover Cable Connection
September 2010
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M9999-090910-1.4
MICROCHIP [ MICROCHIP ]
