Customized Twisted wire from china adopts a pair of mutually insulated metal wires twisted together to resist part of the external electromagnetic wave interference. Twisting two insulated copper wires together according to a certain density can reduce the degree of signal interference. The radio wave radiated by each wire in transmission will be offset by the radio wave emitted by the other wire. Customized Twisted wire from china is generally formed by winding two insulated copper wires 22-26. In actual use, customized Twisted wire from china is wrapped in an insulated cable sleeve by multiple Twisted wire from china. Typically, there are four pairs of twisted pairs, and more pairs are placed in a cable sleeve. These are what we call twisted wire cables. In twisted wire cable (also known as twisted pair cable), different pairs have different twisting lengths. Generally speaking, the twisting length is within 38.1cm to 14cm and twisted counterclockwise. The twisted length of adjacent pairs is more than 12.7cm. Generally, the denser the customized Twisted wire from china, the stronger its anti-interference ability. Compared with other transmission media, twisted pair is limited in transmission distance, channel width and data transmission speed, but the price is relatively low.
Common twisted wires include class 3 wire, class 5 wire and super class 5 wire, as well as the latest class 6 wire. The former has a thin wire diameter and the latter has a thick wire diameter. The models are as follows:

1) Class I line: it is mainly used for voice transmission (class I standard is mainly used for telephone cables before the early 1980s), which is different from data transmission.
2) The common token transmission rate is 4Mbps, which is used for the transmission of voice and 1Mbps.
3) Class III line: refers to the cable currently specified in ANSI and EIA / TIA568 standards. The transmission frequency of the cable is 16mhz, which is used for voice transmission and data transmission with a maximum transmission rate of 10Mbps. It is mainly used for 10base-t.
4) Class IV cable: the transmission frequency of this kind of cable is 20MHz, which is used for voice transmission and data transmission with the maximum transmission rate of 16mbps. It is mainly used for token based LAN and 10BASE-T/100BASE-T。
5) Class V cable: this kind of cable increases the winding density and is covered with a high-quality insulating material with a transmission rate of 100MHz. It is used for voice transmission and data transmission with a maximum transmission rate of 10Mbps. It is mainly used for 100Base-T and 10Base-T networks. This is the most commonly used Ethernet cable.
6) Super class 5 line: super class 5 has low attenuation, less crosstalk, and higher attenuation to crosstalk ratio (ACR) and structural return

Loss), smaller delay error and greatly improved performance. Cat 5 cable is mainly used for Gigabit Ethernet (1000Mbps).
7) Class VI line: the transmission frequency of this kind of cable is 1MHz ~ 250MHz. The comprehensive attenuation crosstalk ratio (PS-ACR) of class VI wiring system should have a large margin at 200MHz, which provides twice the bandwidth of super class v. The transmission performance of Cat 6 cabling is much higher than that of cat 5 standard, which is most suitable for applications with transmission rate higher than 1Gbps. One important difference between category 6 and super category 5 is that it improves the performance in crosstalk and return loss. For the new generation of full duplex high-speed network applications, excellent return loss performance is very important. The basic link model is cancelled in the six types of standards. The wiring standard adopts a star topology. The required wiring distance is: the length of the permanent link shall not exceed 90m and the length of the channel shall not exceed 100m.

At present, customized Twisted wire from china can be divided into unshielded twisted wire (UTP = unshielded twisted pair) and shielded twisted wire (STP = shielded twisted pair)
The outer layer of shielded twisted wire cable is wrapped with aluminum platinum to reduce radiation, but it can not completely eliminate radiation. The price of shielded twisted wire is relatively high, and it is more difficult to install than unshielded twisted pair cable.

Unshielded twisted wire cable has the following advantages:
(1) No shielding jacket, small diameter, saving occupied space;
(2) Light weight, easy to bend and install;
(3) Minimize or eliminate crosstalk;
(4) Flame retardant;
(5) With independence and flexibility, it is suitable for structured generic cabling.
In these two categories, it is divided into 100 ohm cable, double body cable, large logarithm cable, 150 ohm shielded cable, etc.