In order to avoid confusion, we must first understand that there are two standards of the line: EIA / TIA 568A and EIA / TIA T568B standard (Figure). There is no essential difference in the nature, just the difference in color, that is, the line is different. The problem is to ensure: 1, 2 lines are a winding; 3, 6 lines are a winding; 4, 5 line pair is a winding; 7, 8 line pair is a winding. The T568A standard cannot be used at one end of the cable, and the other end uses the T568B standard. The current use is a T568B standard wiring method, then we follow the standard of EIA / TIA 568B to make a joint. If you are doing Hub with your computer's cable, you can use the same criteria at both ends. If two computers docking, you need to use EIA568A to use EIA568B to the other end. [Two standards for network cable production] ★ The normal network cable is relatively simple, and the arrangement of the rj45 in both sides is exactly 12345678. ★ If it is a two-machine straight, the cross-network cable must be used (actually 1236 four lines), the network line provided by the telecom ADSL is this network cable, and the two-headed arrangements are: 1 2 3 4, respectively: 1 2 3 4 5 6 7 8 3 6 1 4 5 2 7 8 If you use a simple network cable measuring instrument, its lamp jump sequence should be: 12 → 45 → 78 → 36 → 12, more detailed in more detail: one end: white orange / orange / White / Blue / Blue / Blue / Green / White / Brown (12345678) 1 2 3 4 5 6 7 8 One End: White Green / Green / White / Blue / Blue / Orange / White Brown / Brown (36145278) 3 6 1 4 5 2 7 8 You can also cross 4578 four lines, namely: 1 2 3 4 5 6 7 8 3 6 1 7 8 2 4 5 1 2 3 4 5 6 7 8 white orange orange white green Blue white blue green white brown tx_d1 tx_d1- tx_d2 TX_D2- TX_D3 TX_D3- TX_D4 TX_D4- TX_D2 TX_D3-TX_D1 TX_D2-TX_D3 TX_D1-TX_D4 TX_D4-White Green Green White Orange Blue White Blue Orange White Brown 1 2 3 4 5 6 7 8
The level of the switch and the router also needs to be used.
