Straight Cable Color Code Wiring
You can also see that both the blue and brown wire pairs on pins 4 5 7 and 8 are not used in either standard.
Straight cable color code wiring. These differ only in which color coded pairs are connected pairs 2 and 3 are reversed. Eia tia 568a 568b are two straight cable color coding standards. As you can see in the picture above the 4 pairs are labeled. Standards of straight cable color code.
We now look at details of these wiring standards. Below is straight through wiring diagram of 568a color coding. This color coding standard was introduced in mid of 1980 s it s not widely used these days. Following is detail of these standards t568a wiring diagram.
Straight wiring diagram standards. We are now going to look at how utp cables are wired. There are two popular wiring schemes that most people use today. Eia tia t568a t568b.
Pin no wire color transmitting receiving. Crossover cable color code tia 568b. T568a color coding standard this color coding standard is not widely used these days. Following table illustrates tia 568b color coding scheme which is applied on left end of cable in crossover cable wiring diagram.
Straight and crossover cable color code utp has 4 twisted pairs of wires we ll now look at the pairs to see what colour codes they have. These color coding standard tell which color is connected to which end. Below is diagram of straight cable color coding based on 568a standard. Pairs 2 3 are used for normal 10 100mbit networks while pairs 1 4 are reserved.
By looking at a t 568a utp ethernet straight thru cable and an ethernet crossover cable with a t 568b end we see that the tx transmitter pins are connected to the corresponding rx receiver pins plus to plus and minus to minus.