These are not shown in the previous table. They will be introduced later in this text.įor the wires left, the "even wires", there's only one color. The question marks (?) were put there because these pins will have different colors in the two standards. Odd wires always have White + some color. A RJ45 connector is a modular 8 position, 8 pin connector used for terminating Cat5e or Cat6 twisted pair cable. CrossoverThe first (far left) colored wire at one end of the cable is the third colored wire at the other end of the cable. If you have to memorize, first try to remember this fact. Figure 4 RJ-45 Cable Identification Examine the sequence of colored wires to determine the type of RJ-45 cable, as follows: Straight-throughThe colored wires are in the same sequence at both ends of the cable. Our software allows you monitor, log, debug. (Abbreviations: G=Green, O=Orange, W=White, Bl=Blue, Br=Brown)Īs we can see, "odd wires" (cables whose position is an odd number) always have two colors, that is, White + Green/Orange/Blue/Brown. Note: DSR & CD are jumpered to fool the programs to think that they are online. So, let's take this, as it's the first thing in common between both standards. Some have just one color, and others have a color together with white. You can take an Ethernet cable to make PRI crossover cable. If you terminate RJ45 jacks at both ends with different TIA/EIA 568 standards (one side TIA/EIA 568A and other side TIA/EIA 568B) you will get a Crossover cable.įirst of all, we know that UTP cabling is composed of 8 wires, grouped in 4 pairs. PRI Crossover Cable Download PDF PRI Crossover Cable Get a ISDN PRI crossover cable from the BRI carrier or make a ISDN PRI cable. If you terminate the RJ45 jacks at both ends of a patch cable with same standard (either TIA/EIA 568A on both sides or TIA/EIA 568B on both sides), you will get a Straight-through cable.
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