An introduction about RJ wiring diagram
RJ stands for Registered Jacks which are used in data and telephone wiring. It is registered with FCC. RJ 45 is a 8 conductors, 8 position jacks which is used in 10BaseT and 100BaseT ethernet wiring.
RJ 45 conductor data cable contains 4 pairs of wires, all consists of a solid colored wire and a strip of the solid colors. There are two wiring standards for RJ 45, first is T-568A and second is T-568B. There are four pair of wire , two pairs- orange wire and green wire are used in 10BaseT or 100BaseT ethernet. And other two color wire (blue wire and brown wire) can be used for phone connection or second ethernet connection. There are two RJ 45 wiring diagram standards(T-568A & T-568B) are used to create a straight -through cable or cross over cable.
For creating a straight-through cable, you will wire either T-568B or T-568A on the both ends of cable. It is used for connecting Data Terminating Equipment to Data Communication Equipment, for example router or computer to hubs(ethernet switches) or modems.
For creating cross over cable ,you will have to use T-568B on one end and T-568A on the other end. It is used for Data Terminating Equipment to Data Terminating Equipment or Data Communication Equipment to Data Communication Equipment, for example computer to router ,computer to computer or gateway to hub connections.
Data communications Equipment do not terminate the signals but Data Terminating Equipment terminate the signals. RJ 45 wiring diagram data cable is used to connect computer to ethernet switch by straight-through cable. In it only 2 pairs of wire :orange(pin 1 and 2)and green(pins 3 & 6) are used, blue(pins 4 & 5) and brown (pins 7 & 8) are not used. In it, connects Pin 1,2,3,4,5,6,7,8 to pin 1,2,3,4,5,6,7,8 respectively on the other end. Cross-over cables are used to connect , TX- to RX- and TX+ to RX+ in which connecting pin sequence is pin 1,2,3,6 to pin 3,6,1,2 respectively and rest pin are connected straight-through.
The color coded scheme is also helpful in RJ 45 wiring diagram. RJ 45 cable have eight color coded wire, and the plugs have conductors and eight pins. All the eight wire are used in four pair, each have to represent negative and positive polarity.
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