The Best Twisted wire in china is the most commonly used transmission medium in generic cabling engineering. The Best Twisted wire in 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 at a certain density can reduce the degree of signal interference. The radio waves radiated by each wire during transmission will be canceled by the radio waves emitted by the other wire. The name "twisted pair" comes from this. The Best Twisted wire in china is generally formed by winding two 22-26 insulated copper wires. In actual use, the Best Twisted wire in china is wrapped in an insulated cable sleeve by multiple pairs of twisted pairs. A typical twisted pair has four pairs, and more Twisted wire in china are placed in a cable sleeve. These are what we call twisted pair cables. In the twisted pair cable (also known as twisted pair cable), different pairs of wires have different twist lengths. Generally speaking, the twist length is within 38.1cm to 14cm, and twist in the counterclockwise direction. The twisted length of the adjacent pair is more than 12.7cm. Generally, the denser the twisted wire, the stronger its anti-interference ability. Compared with other transmission media, the Best Twisted wire in china is limited in transmission distance, channel width and data transmission speed, but the price is relatively low.

The Best Twisted wire in china are Category 3, category 5, super category 5, and the latest category 6. The former has a thin diameter and the latter has a thick diameter. The models are as follows:

1) Class I line: it is mainly used for transmitting voice (class I standard is mainly used for telephone cables before the early 1980s), which is different from data transmission.

2) Class II line: the transmission frequency is 1MHz, which is used for voice transmission and data transmission with the highest transmission rate of 4Mbps. It is commonly used in the old token network that uses the 4Mbps token transfer protocol.

3) Class III line: refers to the cable 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 the maximum transmission rate of 10Mbps. It is mainly used for 10base -- T.

4) Class IV line: the transmission frequency of this type of cable is 20MHz, which is used for voice transmission and data transmission with the highest transmission rate of 16mbps. It is mainly used for token based LAN and 10Base-T / 100base-t.

5) Class V cable: this type of cable increases the winding density and is coated 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 small attenuation and less crosstalk, and has higher attenuation to crosstalk ratio (ACR) and signal-to-noise ratio (structural return loss) and smaller delay error. The performance has been greatly improved. The super-5 line is mainly used for Gigabit Ethernet (1000Mbps).

7) Category 6 cable: the transmission frequency of this type of cable is 1MHz ~ 250MHz. The comprehensive attenuation crosstalk ratio (PS-ACR) of category 6 cabling system should have a large margin at 200MHz, which provides 2 times the bandwidth of category 5. The transmission performance of Cat 6 cabling is far higher than that of cat 5 standard, and it is most suitable for applications with transmission rate higher than 1Gbps. An important difference between category 6 and 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 extremely important. The basic link model is cancelled in the category 6 standards, and the star topology is adopted in the wiring standard. The required wiring distance is: the length of the permanent link cannot exceed 90m, and the length of the channel cannot exceed 100m.

At present, the Best Twisted wire in china can be divided into unshielded twisted pair (UTP = unshielded twisted pair) and shielded twisted pair (STP = shielded twisted pair). The outer layer of shielded twisted pair cable is wrapped with aluminum platinum to reduce the radiation, but it cannot completely eliminate the radiation. The price of shielded the Best Twisted wire in china is relatively high, and the installation is more difficult than that of unshielded the Best Twisted wire in china. Unshielded the Best Twisted wire in china has the following advantages:

(1) No shielding jacket, small diameter, saving space occupied;

(2) Light weight, easy to bend, easy to install;

(3) Minimize or eliminate crosstalk;

(4) Flame retardant;

(5) It is independent and flexible and suitable for structured generic cabling.

These two categories are divided into 100 ohm cable, dual cable, large pair cable, 150 ohm shielded cable, etc.