Computer and Software Support


Network cables

Got the following information at http://www.incentre.net/incentre/frame/ethernet.html  I have reprinted it on my website to avoid possible information loss in the event the link to incentre goes bad.

Connections that require the use of a Crossover cable

  • Computer to computer
  • Computer to uplink port
  • Computer to print server
  • Uplink port to uplink port (hub/switch)
  • Normal port to normal port (hub/switch)

 

Connections that require the use of a Straight-through cable

  • Computer to residential gateway/router
  • Computer to normal port (hub/switch)
  • Access point to normal port (hub/switch)
  • Print server to normal port (hub/switch)
  • Uplink port to normal port (hub/switch)

 

How to identify the cable as a crossover or a straight through cable.

  1. Hold both ends of the cable next to each other
  2. On both ends have the clip facing away from you
  3. If both ends have the same color sequence then it is a straight through cable.
  4. If both ends do not have the same color sequence than it is a crossover cable.

The color-coding specified within the clip is defined as EIA/TIA 568A/568B.

With the clip away from you the Brown will be to your right and Pin one is on your left.

   

T-568A Straight-Through Ethernet Cable

 

 

T-568B Straight-Through Ethernet Cable

   

 

 

RJ-45 Crossover Ethernet Cable

   

 

   

 

The TIA/EIA 568-A standard which was ratified in 1995, was replaced by the TIA/EIA 568-B standard in 2002 and has been updated since. Both standards define the T-568A and T-568B pin-outs for using Unshielded Twisted Pair cable and RJ-45 connectors for Ethernet connectivity. The standards and pin-out specification appear to be related and interchangeable, but are not the same and should not be used interchangeably.