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What Is rj45 Color Code?Just Read This Article

What Is rj45 Color Code?Just Read This Article

October 16 , 2023 0

Rj45 Color Code

In the TIA/EIA-568-B color code, the wires inside an Ethernet cable are typically color-coded as follows:

Pair 1 (Pin 1, 2): White/Orange, Orange
Pair 2 (Pin 3, 6): White/Green, Green
Pair 3 (Pin 4, 5): White/Blue, Blue
Pair 4 (Pin 7, 8): White/Brown, Brown

RJ45 Design Principles

RJ45 consists of a plug and a socket, two components that make up a connector that connects between the wires for electrical continuity of the wires
The heart of the RJ45 module is the modular jack. The gold-plated wire or socket hole maintains a stable and reliable electrical connection to the modular socket shrapnel. The electrical contact is further enhanced with the insertion of the plug due to the friction between the shrapnel and the jack. The jack body is designed with an integral locking mechanism so that when the modular plug is inserted, maximum pull-out strength is generated outside the interface of the plug and jack.The wiring module on the RJ45 module connects twisted-pair cables through the "U"-shaped wiring grooves, and the locking tabs secure the RJ45 module to information outlets such as panels.

RJ45 Wire Sequence Connection

The information module or RJ45 connecting plug and twisted pair termination has two structures, T568A or T568B. In T568A, with which the eight wires are defined as: white green, green; white orange, blue; white blue, orange; white brown, brown. In T568B, the 8 lines connected to it are defined as: white orange, orange; white green, blue; white blue, green; white brown, brown. The differential transmission lines defined therein are white-orange and orange cables, white-green and green cables, white-blue and blue cables, and white-brown and brown cables. In order to achieve the best compatibility, the production of straight-through cable is generally used in the T568B standard.RJ45 crystal header pin sequence number should be observed in the following way: the RJ45 plug front (the side with copper pins) towards their own, there are copper pins on one end of the header towards the top, the end of the connecting cable towards the bottom, from left to right will be the 8 copper pins in order numbered from 1 to 8.

RJ45 two kinds of chuanlianf wiring sequence diagram

From pin 1 to pin 8 corresponds to the wire order as follows: T568A: ① white-green, ② green, ③ white-orange, ④ blue, ⑤ white-blue, ⑥ orange, ⑦ white-brown, ⑧ brown Mnemonic 1: green-blue-orange-brown, the light color in the front, three or five interchangeable Mnemonic 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 Mnemonic 1: orange-blue-green-brown, light color in the front, three or five interchangeable Mnemonic 2: white-orange-orange, white-green-blue, white-blue-green, white-brown-brown Two international standards do not have the essence of the nature. Blue, green and brown, light color in the front, three and a half interchangeable mnemonic 2: white orange orange, white green blue, white blue green, white brown brown two international standards is not essentially different, just the difference in color, it should be noted that in the connection of the two RJ45 crystal head must be ensured that: 1, 2 feet pair is a winding pair, 3, 6 feet pair is a winding pair, 4, 5 feet pair is a winding pair, 7, 8 feet pair is a winding pair. Only one connection standard can be used in the same integrated wiring system project. The production of connecting cables, sockets, distribution frames, etc. are generally more often used TIA / EIA-568-B standard, otherwise, it should be clearly labeled. Cables need to be terminated with similar connection devices. For example, Category 5e and Category 6 connectors are similar in appearance, but there is a difference in the physical mechanism. If a Category 5e cable is terminated with a Category 3 standard connector or patch panel, it will reduce the performance of the cable channel to Category 3. So in order to ensure the performance indicators of the cable, the modular connectors must also meet the appropriate standards. Network transmission cables are categorized as straight-through, crossover and all-reverse cables. Straight-through cables are used to interconnect heterogeneous network devices, for example, computers and switches. Crossover cables are used to interconnect network devices of the same type, for example, computers to computers. All-reversed lines are used for connections between super-terminals and the control physical interfaces of network devices.

RJ45 Pin Definitions

There are two common types of RJ45 interfaces: the DTE (Data Terminal Equipment) type used for Ethernet NICs, router Ethernet interfaces, etc., and the DCE (Digital Communications Equipment) type used for switches, etc. When two devices of the same type are connected for communication using the RJ45 interface, they must be connected using a crossover cable. If the DTE type interface and the DTE type interface are connected without cross-connecting the pins, the pairs of pins that touch each other are data receiving (transmitting) pins, and communication is not possible. In addition: some DCE type devices and the other side of the auto-negotiation, this time the connection with a straight-through line or parallel line can be.