Rj45 Pin Assignment

Note: These pages were originally written when the world was young and 10m LANs were nose-bleedingly fast.They have been updated over the years but still contain some now long-in-the-tooth (aka legacy) stuff about crossed cables especially.

Note: These pages were originally written when the world was young and 10m LANs were nose-bleedingly fast.They have been updated over the years but still contain some now long-in-the-tooth (aka legacy) stuff about crossed cables especially.

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Thus, the following table shows a variety of cable types with their bright and shiny ISO/IEC designations: Problems, comments, suggestions, corrections (including broken links) or something to add?

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Crossed cables are used to connect PCs to one other PC or to connect a HUB to a HUB.

Crossed cable are sometimes called Crossover, Patch or Jumper cables.

Please be aware that modifying Ethernet cables improperly may cause loss of network connectivity.

Use this information at your own risk, and ensure all connectors and cables are modified in accordance with standards.The following description shows the wiring at both ends (male RJ45 connectors) of the crossed cable.The following cable description is for the wiring of BOTH ends (RJ45 Male connectors) with your category 5 wiring colors (TIA/EIA 568A or 568B though the example uses 568B colors).You will have a warm inner glow for the rest of the day.The information listed here is to assist network administrators in the color coding of Ethernet cables.Crossed cables are sometimes called Crossover, Patch or Jumper cables.If your connection is PC to HUB you MUST use a Straight cable.10Gbase-T defines 10 gigabit Ethernet over copper cables (multiple other PHYs also exist within the 10G Ethernet ecosystem).Originally defined in 802.3an (2006) this has now been consolidated into the base 802.3-2008 spec (available at no cost from the IEEE). A cheap magnifying glass can sometimes help enormously.There is NOTHING more annoying than spending 30 minutes debugging a network problem to find it was the cable.Badly made or non-standard cabling is a foolish thing to spend time on - do it once and do it right.