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Factors for testing electrical performance indicators of RJ connectors:

1. Dielectric strength, or withstand voltage, dielectric withstand voltage, is the ability to withstand the rated test voltage between the connector contacts or between the contacts and the shell.

2. Electrical connectors with high-quality contact resistance should have low and stable contact resistance. The contact resistance of the connector ranges from a few milliohms to tens of milliohms.

Factors for testing electrical performance indicators of RJ connectors:

3. Insulation resistance is a measure of the insulation performance between electrical connector contacts and between the contacts and the shell, and its magnitude ranges from hundreds of megohms to thousands of megohms.

4. Other electrical properties.

For RJ connectors, electromagnetic interference leakage attenuation is to evaluate the electromagnetic interference shielding effect of the connector, and electromagnetic interference leakage attenuation is to evaluate the electromagnetic interference shielding effect of the connector, and it is generally tested in the frequency range of 100MHz~10GHz.

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In order to achieve the best compatibility, the T568B specification is generally used when manufacturing the straight-through cable. The sequence number of the RJ crystal header pins should be observed as follows: turn the front of the RJ plug (the side with the copper pins) toward you, the end with the copper pins upwards, and the end of the connecting cable downwards, and 8 copper The needles are numbered in sequence from 1 to 8.
The corresponding line sequence from pin 1 to pin 8 is:
T568A: ① white-green, ② green, ③ white-orange, ④ blue, ⑤ white-blue, ⑥ orange, ⑦ white-brown, ⑧ brown
Mantra 1: Green, blue, orange, brown, light colors in front, interchangeable between three and five
Mantra 2: White green green, white orange blue, white blue orange, white brown brown
T568B: ① white-orange, ② orange, ③ white-green, ④ blue, ⑤ white-blue, ⑥ green, ⑦ white-brown, ⑧ brown
Mantra 1: Orange, blue, green, and brown, with light colors in front, interchangeable between three and five
Mantra 2: White Orange Orange, White Green Blue, White Blue Green, White Brown Brown
There is no substantial difference between the two international standards, but the difference in color. It should be noted that when connecting two RJ crystal heads, it is necessary to ensure that: pin 1 and pin 2 are a winding pair, and pin 3 and 6 are a winding pair. Yes, pin 4 and 5 are a winding pair, and pin 7 and 8 are a winding pair. In the same integrated wiring system project, only one connection specification can be selected. TIA/EIA-568-B specifications are generally used in the manufacturing of connecting cables, sockets, and distribution frames. Otherwise, they should be clearly marked.