The twisted lines can be seen everywhere in our daily lives. It is most common in the network and telephone installation, but how much do you know about the twisted line? What are the differences between the twisted lines and other cables, how many types, and what connectors are connected, and how do you connect? This article will give you the answer.

What is the twisted line

The twisted wire is a kind of wiring composed of two separate insulating wires in accordance with a certain standard. By twisting the wire, part of the noise signal is transmitted (send) in one direction, while the other part is transmitted (receiving) along the inverse direction. It will be offset by the twist of the wire. Simply put, compared with the lines arranged by a single wire or non -double -twisted horizontal level, the twisted line reduces the inter -line -pairing electromagnetic radiation and the inter -neighboring lines, and effectively suppress the electromagnetic interference from the outside. According to the EIA/TIA-568 standard, the twisted wire cables are divided into different categories, such as Cat5e, CAT6, CAT7, and CAT8 are both twisted cables.

Type of twisted lines

In order to better anti -interference in signal transmission, some twisted cables have shielding devices, cables with shielding device are called shielded twisted twisted cables (STP), and cables without shielding device are called non -shielding dual dual -dual -dual -dual -dual -dual -dual -dual -dual -dual -dual -dual -dual -dual -dual -dual -dual -dual -dual -dual -duals dual -dual -double Toward (UTP). The following will be specifically explained to the difference between the shielded twisted twisted and non -shielding twisted lines.

Non -shielding twisted twisted line

Non -shielding twisted tie UTP is a low -cost network cable that is made of four pairs of insulating wires together, and is protected by plastic insulation. There is no aluminum foil and metal woven mesh shielding layer inside the non -shielding pair, which makes the cable smaller diameter. 24 AWG (American Wire Gauge) is the most common UTP cable size. Quick (FS) also provides extremely fine network cables with a diameter of 28AWG. It supports 250MHz bandwidth and 1000-T Ethernet network. It is easier to carry out cable management in a narrow space, which helps improve air circulation between equipment.

1. Application of UTP cable

In addition to the UTP cable in the Ethernet connection and telephone system, computer network connections often use UTP cables. With the increase of UTP cable bandwidth to match the baseband of the TV signal, UTP cables are now used in video applications such as security cameras.

2. The advantages of UTP cable

Compared with other network transmission mediums, the cost cost of UTP cables is lower and the price is cheaper.

The UTP cable is powerful and can be used with most other mainstream network systems without having to ground.

The UTP cable size is smaller, and it is easier to install and manage.

Shielding twisted tie

The difference between the UTP non -shielding cable is that the inside of the STP shielding cable is equipped with aluminum foil and metal woven mesh shielding layer, which can make the cable transmission signal avoid interference, thereby achieving faster data transmission. The working principle of the STP cable is to attract the interference signal to the shielding layer and then introduce the ground cable. According to different shielding layers, STP cables can be divided into two types: aluminum foil shielding cables (FTP — FTP — FTP — FTP — FTP — FTP — FTP — FTP — FTP — FTP — FTP — FTP FTP ——SFTP — SFTP — SHIELDED/FOIL Twisted Pair) type:

Aluminum foil shield cable (FTP)

——The twisted pair of FTP cables is wrapped in the aluminum foil shielding layer to protect the cable from being disturbed and skewed by electromagnetic.

Double shielding cable (SFTP)


——SFTP cable is a layer of metal woven mesh shielding layer on the basis of FTP/STP’s aluminum foil shielding layer. The material of the metal woven network is usually bronze. Under the dual blessing of the aluminum foil shielding layer and the metal woven mesh shield, the anti -interference capacity of the SFTP cable is stronger, and at the same time, it effectively reduces the attenuation of the internal signal.

1. Application of STP cable

STP cables are widely used in computers networking and telephone systems. The more common computer wiring is connected to Ethernet, and the telephone connection required by commercial and residential housing. Because STP cables are durable and have good shielding performance, they are also widely used in large -scale industrial environments with strong electromagnetic interference.

2. The advantages of STP cable

The shielding performance of the STP cable can effectively anti -interference anti -string disturbance.

STP cable supports higher -speed data signal transmission.

STP cable transmission data is more secure.

Type of twisted tie connector

Depending on the application scenarios, the twisted connectors mainly include two types: RJ11 connector and RJ45 connector:


RJ11 connector

RJ11 is a US -standard telephone connector, usually with 6 PIN ports, and 4 or 2 contacts, which are represented by 6P4C (Six Position, Four Conductor) and 6P2C (Six Position, Two Conductor). The RJ11 connector is small in shape and used to be the first choice in commercial and residential telephone applications.

RJ45 connector

The size of the RJ45 connector is larger than the RJ11 connector. It is the most widely used connector now, with 8 PIN ports and 8 contacts, which is expressed as 8P8C. The RJ45 connector is an indispensable part of the Ethernet network connection. It is mainly used to connect computers, routers, switches and other network devices on both ends of the twisted line.

The line order and connection method of the twisted line

The twisted lines are arranged in accordance with certain specifications and connected to the RJ45 connector, forming the network cable we see in our daily life. The line order and twisted wire connection method of the twisted twisted line will be explained in detail below.

Bi Gloved wire sequence introduction

In the wiring standards formulated by the TIA (Telecom Industry Alliance)/EIA (Electronic Industry Alliance), the order of the twisted lines is specified as 568A and 568B of line order.

568A line order

—— 1-green white 2-green 3-orange-white 4-blue 5-blue white 6-orange 7-brown white 8-brown

568B line order

—— 1-orange-white 2-orange 3-green white 4-blue 5-blue white 6-green 7-brown white 8-brown

The wiring method of the twisted line

After clarifying the order of twisted twisted lines, prepare cable stripping, threading clamping, network cable tester (or directly preparing a network installation toolkit), and then follow the following wiring steps to easily realize the twisted twisted lines. Connection with the connector.

TIPS: Before installing any connector, read the product description.

step 1


The tail end of the twisted twisted wire will be measured, and then the cable is trimmed to trim it to the appropriate length.

Step 2

Use a cable to peel off the end of the cable about 1.5 inches from the end of the cable.

Step 3

Pull the trimmed protective cover from the cable to expose the internal conductor. If there is a sewing sewing (usually a white line), separate it from the conductor and trim it to the edge of the protective cover.

Step 4

Separate all entangled wires so that you can see each separate wire.

Step 5


Arrange the wire according to the line sequence.

Step 6

Pruning the wires to make the end flat, ensuring that the shenthes of the cable can be placed in the connector.

Step 7

Insert the wires into the connector according to the line order to ensure that all wires are aligned correctly with the connecter pins.


Step 8

Carefully place the connector and cable in the threading tong, and then push the pins in the connector into the connector. The installation is complete.

After the entire installation is completed, you should check that all pins have been pressed into their respective conductors. If the connector is not pressed correctly, please open the connector and replace it according to the steps.

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