Company News

• Classification and difference of various network cables

  2021 / 01 / 14

  Nowadays, the network cable arowana in the computer market is mixed, with various colors and skins, making people in the industry dumbfounded. Here are some basic knowledge about network cables for your reference: Cables mainly include: twisted pair (also known as network cable), optical fiber and coaxial cable (earlier products, now rarely seen and used). Among the three, coaxial cable is gradually eliminated by the market due to its relatively high price and general performance; optical fiber has very good performance, but the price is too high and installation is more difficult. Generally, it is only used when all indicators require relatively high performance. In high network environments, home networks rarely have this application; twisted-pair cables are widely used in wired networks because of their low price, simple installation method, and good and stable performance. Twisted wire cables are generally divided into 8 categories: Category 1 line is mainly used for voice transmission; Because the transmission frequency of category 2 line is only 1MHZ, it is mainly used in the old token network; Category 3 cables are mainly used for 10BASE-T networks; Category 4 line token network and 10BASE-T/100BASE-T network; Category 5 cable has a transmission rate of 100MHz and is used in 100BASE-T and 10BASE-T networks. It is the most commonly used Ethernet cable; Super Category 5 cable is mainly used for Gigabit Ethernet (1000Mbps); The transmission frequency of Category 6 lines is 1MHz~250MHz, which is suitable for networks with a transmission rate higher than 1Gbps; Category 7 cable is the latest unshielded twisted pair cable with a transmission frequency of at least 500+MHz and a transmission rate of 10+Gbps. In addition, twisted pair cables are divided into two types: shielded and unshielded. Shie

• Is there a good or bad difference between the network cable RJ45 connector?

  2021 / 01 / 13

  On the one hand, the poor RJ45 connector is not easy to be clamped, on the other hand, the copper sheet is easy to disconnect from the network cable. Identification method: At first glance, look at the color of the RJ45 plug, the color of the high-quality crystal head is clear and clear, no variegated, no stray particles; Secondly, look at the thickness of the crystal head, the high-quality crystal head is thicker and uniform than the inferior crystal head, and the edges and corners are distinct; Three smells, smell the crystal head, high-quality crystal head has no odor, no peculiar smell, no strange smell, no smell; Four pressures, the elasticity of the crystal head is pressed, the high-quality crystal head is flexible, and the inferior crystal head is weak; Five, the sound of the crystal head, the high-quality crystal head sounds crisp, and the catch behind it is even more obvious. In fact, the quality of the network cable and the network head cannot be ignored. When the quality of the network cable is not good, signal interruption is prone to occur.

• What is a LSZH network cable?

  2021 / 01 / 06

  Low smoke zero halogen, abbreviated as LSZH, LSOH, LSFH and OHLS, refers to the material of the outer skin of the network cable. In the material classification of wire sheath in the wire and cable industry, the low-smoke halogen-free network cable sheath is composed of thermoplastic or thermosetting that emits low smoke when heated and does not contain halogen. Most of the network wire coating is composed of polyethylene, polyvinyl chloride or thermoplastic polyurethane. If it catches fire, chlorinated plastic will release toxic hydrogen chloride, and if it encounters water, it will produce hydrochloric acid. The low-smoke halogen-free materials will not release hydrogen halides or other acids during fire. Low-smoke halogen-free materials can reduce the toxic and corrosive gases produced when they burn. In poorly ventilated environments such as airplanes, train cars, or ships, low-smoke and halogen-free network cables are often used. Low-smoke and halogen-free materials are also commonly used in the railway industry, because there are high-voltage lines under the railway or signal lines that transmit train positions. The use of low-smoke halogen-free materials also reduces the accumulation of toxic gases when the circuit is damaged due to fire or short circuit. Like in the railway industry or the shipbuilding industry, one of the most important requirements is to protect personnel and equipment from toxic and corrosive gases. In these occasions, low-smoke and halogen-free materials are required to be used in the outer layer of the wires and cables. One of the selling points of low-smoke and halogen-free network cables is that few companies have deliberately emphasized low-smoke and halogen-free, unless Party A and the design unit explicitly require it. Mainly because of price factor considerations. Some small local factories do not produce low-smoke halogen-free cables.