HOW TO PUT TOGETHER GRAY TRANSMISSION JACK CODE
Note that the only difference between T568A and T568B is the reversal of pairs 2 and 3 - it's only a color code change, but if you mix up the two on each ends of a cable you will have a wiremap problem. Jacks: The jacks are then terminated with these layouts, looking into the jack: split pairs which cause big problems with high speed transmission. Note: Plugs/jacks and punchdowns have different color codes! You cannot mix them up as they will result in wiremap errors - esp. The stripe wire is "tip" and the solid color wire is "ring," referring to the tip of the old 1/4" telephone plug and the ring around the shaft that makes the connections. The cable pairs are color coded as shown:Įach pair consists of a colored wire and a white wire with a matching color stripe. Either work equally well, as long as you don't mix them! If you always use only one version, you're OK, but if you mix A and B in a cable run, you will get crossed pairs! In LANs, as spec'ed by 568, there are two possible pinouts, called T568A and T568B that differ only in which color coded pairs are connected - pair 2 and 3 are reversed. These terminations are called "IDC" for "insulation-displacement connections," by the way, since the wires are held in knife-edge terminations that slice through the insulation and dig into the copper wire, forming a tight seal.
The plug/jack (right) is often called a "RJ-45", but that is really a telco designation for the "modular 8 pin connector" terminated with a USOC pinout used for telephones. The male connector on the end of a patchcord is called a "plug" and the receptacle on the wall outlet is a "jack." UTP cables are terminated with standard connectors (plugs and jacks) or punchdowns. Home Who's Uncle Ted? Jargon Overview of Structured Cabling Cables Terminations Installation Testing Wrapup, Training Programs and Equipment Uncle Ted's Guide To Communications Cabling
HOW TO PUT TOGETHER GRAY TRANSMISSION JACK FREE
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