Pin 1 of connector A would be connected to Pin 8 of connector B. Rollover wired cables, most commonly called rollover cables, have opposite pin assignments on each end of the cable or in other words it is “rolled over”. Examples would be connecting a computer directly to another computer, connecting a switch directly to another switch, or connecting a router to a router. Crossover cables are most commonly used to connect two hosts directly. Pin 2 of connector A goes to Pin 6 of connector B, etc. Pin 1 of connector A goes to Pin 3 of connector B. Crossover WiringĬrossover wired cables, commonly called crossover cables, are very much like straight-through cables with the exception that TX and RX lines are crossed (they are at opposite positions on either end of the cable). When we talk about cat 5e patch cables, the Straight-through wired cat 5e patch cable is used to connect computers, printers and other network client devices to the router switch or hub (the host device in this instance). Straight-through wired cables are most commonly used to connect a host to client. In other words Pin 1 of connector A goes to Pin 1 of connector B, Pin 2 to Pin 2, etc. Straight-through refers to cables that have the pin assignments on each end of the cable. Arrange the wires according to these 3 categories: straight-through, crossover, and rollover. There are 8 wires corresponding to 8 pinouts in each connector (A and B) on both sides of the cable. cat 5e, designated with particular bands of color.

The image above illustrates the wires that can be found inside a cable, e.g. The problem may be due to the number of twisted wires inside the cable arranged in different combinations. These terms are referring to the way the cables are wired (which pin on one end is connected to which pin on the other end). For some, differentiating straight-through, crossover, and rollover wiring of cables could be quite challenging.

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