Straight-through, Crossover, and Rollover Wiring

When talking about cable pinouts we often get questions as to the difference in Straight-through, Crossover, and Rollover wiring of cables and the intened use for each type of cable. 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). Below we will try shed some light on this commonly confused subject.




Straight-Through Wired Cables
Straight-Through refers to cables that have the pin assignments on each end of the cable. In other words Pin 1 connector A goes to Pin 1 on connector B, Pin 2 to Pin 2 ect. Straight-Through wired cables are most commonly used to connect a host to client. When we talk about cat5e patch cables, the Straight-Through wired cat5e 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).


  • Connector A
  • Pin 1
  • Pin 2
  • Pin 3
  • Pin 4
  • Pin 5
  • Pin 6
  • Pin 7
  • Pin 8


  • Connector B
  • Pin 1
  • Pin 2
  • Pin 3
  • Pin 4
  • Pin 5
  • Pin 6
  • Pin 7
  • Pin 8
Straight-Through Wired

Crossover Wired Cables
Crossover 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 oposite positions on either end of the cable. Using the 568-B standard as an example below you will see that Pin 1 on connector A goes to Pin 3 on connector B. Pin 2 on connector A goes to Pin 6 on connector B ect. Crossover cables are most commonly used to connect two hosts directly. Examples would be connecting a computer directly to another computer, connecting a switch directly to another switch, or connecting a router to a router.Note: While in the past when connecting two host devices directly a crossover cable was required. Now days most devices have auto sensing technology that detects the cable and device and crosses pairs when needed.


  • Connector A
  • Pin 1
  • Pin 2
  • Pin 3
  • Pin 4
  • Pin 5
  • Pin 6
  • Pin 7
  • Pin 8


  • Connector B
  • Pin 3
  • Pin 6
  • Pin 1
  • Pin 7
  • Pin 8
  • Pin 2
  • Pin 4
  • Pin 5
Crossover Wired

Rollover Wired Cables
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". Pin 1 of connector A would be connected to Pin 8 of connector B. Pin 2 of connector A would be connected to Pin 7 of connector B and so on. Rollover cables, sometimes referred to as Yost cables are most commonly used to connect to a devices console port to make programming changes to the device. Unlike crossover and straight-wired cables, rollover cables are not intended to carry data but instead create an interface with the device.


  • Connector A
  • Pin 1
  • Pin 2
  • Pin 3
  • Pin 4
  • Pin 5
  • Pin 6
  • Pin 7
  • Pin 8


  • Connector B
  • Pin 8
  • Pin 7
  • Pin 6
  • Pin 5
  • Pin 4
  • Pin 3
  • Pin 2
  • Pin 1
Rollover Wired

How to Build Cat5e Patch Cables
[ProductName] Build Cat5e Patch Cables

Within this "How To" article we have included all the information you should need to find the materials, tools, and info on how to build straight through CAT 5e Patch Cables and Crossover CAT 5e Patch Cables. We will discuss materials needed, cable preparation, as well as connector termination. Large detialed photos assist in the learning process.

How to Make Your Own Patch Cables
AC-C51P-100
Networx™ Cat5e RJ45 Modular Connector - 100 Pack Networx™ Cat5e RJ45 Modular Connector - 100 Pack

Networx™ CA5e Modular Connectors are perfect for terminating all of your custom built, high-speed CAT5e patch cables.
Cat 5 e cable is an enhanced version of Cat 5 that adds specifications for far end crosstalk. It was formally defined in 2001 as the TIA/EIA-568-B standard, which no longer recognizes the original Cat 5 specification. Although 1000BASE-T was designed for use with Cat 6 cable, the tighter specifications associated with Cat 5e cable and connectors make it an excellent choice for use with 1000BASE-T ethernet networks.
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TL-STUTPSTP
UTP/STP Economy Stripper UTP/STP Economy Stripper

The TL-STUTPSTP from Networx™ is the ideal solution for stripping UTP/STP while keeping things under budget. (More Info)
TL-MCT468P
Premium Modular Crimp Tool for RJ45/RJ11 4, 6 and 8 conductor Premium Modular Crimp Tool for RJ45/RJ11 4, 6 and 8 conductor

The TL-MCT468P from Networx™ will make terminating RJ-11/45 cables a snap. (More Info)
AC-C62P-100
Networx™ Cat6 RJ45 Modular Connector with Load Bars - 100 Pack Networx™ Cat6 RJ45 Modular Connector with Load Bars - 100 Pack

Networx™ CAT6 Modular Connectors with Load Bars are perfect for terminating all of your custom built, high-speed CAT6 patch cables. (More Info)
TL-STUNIV
RG-59/6/7/11/UTP/STP Cable Stripper RG-59/6/7/11/UTP/STP Cable Stripper

The TL-STUNIV from Networx™ is a great stripping tool that can handle multiple types of cables. The TL-STUNIV is capable of stripping UTP/STP cable along with CAT5e, CAT6 and round telephone cable. (More Info)




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