Description

This article is from the Data Communications Cabling FAQ, by Peter Macaulay pmac@fox.nstn.ca with numerous contributions by others.

10.0 Birds and Bees (Plugs vs. Jacks) (Data Communications Cabling)

The EIA/TIA specifies an RJ-45 (ISO 8877) connector for Unshielded
Twisted Pair (UTP) cable. The plug is the male component crimped
on the end of the cable while the jack is the female component in
a wall plate or patch panel, etc. Here is the pin numbering to
answer the question, where is pin one?

  Plug                          Jack
  (Looking at connector          (Looking at cavity
   end with the cable             in the wall)
   running away from you)
  
      ---------- /                   ----------
     | 87654321 |                   | 12345678 |
     |""      ""|/                  |/"      /"|
        |"__"|                         |/"_"|

 

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• prev: 9.0 Standard EIA/TIA 568 (Data Communications Cabling)
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• next: 11.0 Standard Networking Configurations (Data Communications Cabling)

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networking, cabling, data communications, standards, implementations, 10Base-T, Classification, cable rating, fiber optic cable