ماهو كبل الشبكة

RJ 45 Connector

Network Cable Theory

TX (transmitter) pins are connected to corresponding RX (receiver) pins, plus to plus and minus to minus.

4, 5, 7, and 8 (the blue and brown pairs are not) used in either standard.  these pins and wires are not used or required to implement 100BASE-TX Duplexing they are just plain wasted that is why they were not included in the picture above

Straight Through Cable

To make a straight network cable all what you need to remember is the color order , please keep in mind the

table bellow. remember also that in straight cable wiring  both ends are the same

1. White-Orange
2. Orange
3. White-Green
4. Blue
5. White-Blue
6. Green
7. White-Brown
8. Brown

Crossover Cable 

(One End Normal – other End Cross)

in the straight-through cable just replace at one end only  1 with 3 and 2 with 6 to make cross.

crossover: A type of Ethernet cable in which the "send" and "receive" pairs are crossed, so it can be used to connect similar network devices (such as switches, or PCs without a hub/switch between them) directly

1.  White-Green
2.  Green
3.  White-Orange
4.  Blue
5.  White-Blue
6.  Orange
7.  White-Brown
8.  Brown 

--------------------------------------------------------------------------------------------

Posted in: الشبكات