Gathering professional telephone line brand knowledge to provide consumers with the most authoritative top ten brands of telephone sets and the difference between two-core and four-core telephone lines. It is an important reference for consumers to understand the wiring method of telephone lines. Brand knowledge query website with reference value. Q: Kitchen storage and storage
The common specifications of telephone lines are two-core and four-core, with wire diameters of 0.4 and 0.5 respectively, and 0.8 and 1.0 in some areas. In addition to two cores and four cores, there are four, six, eight and ten cores. In general households, 2 cores are enough to use if it is the current mode of use in the city. If it is used by a company or some PBX, considering the need for broadband use of the telephone, it is recommended to use a 4-core telephone line. If a digital phone is used, it is recommended to use a 6-core telephone line.
Telephone lines are widely used in communication services. To choose a suitable and high-quality telephone line, you first need to understand some common sense about electric wires.
Part1: Preparation before purchasing a telephone line – understanding the common sense of telephone lines 0.8 and 1.0. In addition to two cores and four cores, there are four, six, eight and ten cores. Considering the use of telephone and broadband, 4 cores are used more.
1 Common specifications of telephone lines
2 The difference between two-core and four-core telephone lines or some PBX), 6-pin (6-pin is suitable for digital phone use). The two-core standard telephone crystal head is RJ32. They are called A line and B line respectively, and there is no difference between positive and negative poles. As for the four-core wire of the handset, after coming out through a coil or integrated circuit, four wires are needed to reach the handset, two are used by the MIC, and the other two are used by the receiver. Generally, two-core twisted pair cables are purchased, and 4-core cables can be considered if conditions permit.
The 2-pin is for analog telephone signals (that is, the current local phone usage mode), and the 4-pin is for digital telephone signals; the home decoration wiring is generally arranged with 2 network cables, one network and one phone (the cost difference is not different. many). Only 2 telephone lines are needed for telephone transmission, that is, the middle 2 cores. According to the standard wiring sequence, red and green are usually used. Phone transmission, yellow and black are used for reverse polarity transmission.
The four-core telephone line is mostly used for the wiring of the current office system: just like the network cable, it has eight cores, but actually uses four cores and spares 2 cores; 2 cores. In modern office communication, many imported communication terminals are 4-core telephone lines. Only in the case of integrated wiring, the actual needs of users can be solved by considering the development of users for 2-5 years.
Reminder: I often see that many users have only renovated for more than a year, because they did not take into account the long-term development of the company’s business, add a fax machine (going through the open line); add an extension (because there is no line, The open wiring is connected from other rooms), resulting in a very cluttered office room. Because of this, it is recommended to use it as a telephone line. Under normal circumstances, it is best to use a 4-core twisted pair.
Two-core, four-core, six-core telephone line is used in local telephone use mode, suitable for home wiring, mostly used for company or some group office system lines, used for high-speed digital telephones, and there is no positive or negative connection method. , One telephone, one network cable, no wiring sequence, black, red, green, yellow, red and green for telephone transmission, and yellow and black for reverse polarity transmission. Q: Kitchen storage
In actual wiring work, four-core wires are often used. Why use a four-core telephone line? Because the four-core telephone line must be used when making the front-end host line of the program-controlled telephone exchange (the working distance of the four-core line of the special telephone is within 100 meters, and the connection must be disconnected from the host when crimping).
Part2: Master the purchase method of telephone lines to ensure the quality of calls Q: Kitchen storage and storage
1. The brands on the list are trustworthy and the product quality is guaranteed. The conductor adopts imported high-purity oxygen-free copper telephone line, which has small transmission attenuation, small signal loss, clear sound quality and no noise, and no sense of distance when talking.
2. The sheath is made of high-grade transparent outer quilt telephone line, which is resistant to acid and alkali corrosion, anti-aging, and has a long service life. The sheath is made of transparent material telephone line, which has good mechanical and physical properties, electrical properties and thermal stability, and the content of heavy metals such as lead and cadmium and heavy metal compounds is extremely low.
3. The telephone line using imported polypropylene material has high purity, lower transmission attenuation and higher transmission speed. High transfer speed requirements.
4. The copper core of the qualified copper core telephone wire should be purple, shiny and soft to the touch. The copper core of the fake copper core wire is purple-black, yellowish or white.
5. The high-quality crystal head looks bright and transparent, a bit like a crystal, its exterior is very smooth, the material of each part will not contain any impurities, and the transparency is high . Secondly, the plastic mouth part of the crystal head is relatively strong. Squeeze the hollow part of the crystal head by hand. If there is obvious deformation, it means that there is a problem with its quality. In addition, the quality of the top copper sheet directly affects the quality of the crystal head. When checking the copper sheet, first check whether the cut edge of the metal terminal part is neat. The color of the good crystal head copper sheet should be golden yellow, and the inferior products will have a darkening and blackening of the surface after oxidation due to the different materials used.
Q What is the best material for the telephone line? Q: Kitchen storage
1. Copper-clad steel: This kind of wire is relatively hard and is not suitable for external wire pulling, which is easy to break the core. But it can still be used when buried in the wall. And it can only be used for short-distance use, (such as corridor junction box to user) oxygen-free copper 2-core telephone line oxygen-free copper 2-core telephone line.
2. Copper-clad aluminum: This kind of wire is softer and easier to break. It can be buried in the wall, or it can be pulled outside the wall. And it can only be used for close-range use, (such as corridor junction box to user)
3. All copper: This kind of wire is soft and can be buried in the wall or in the wall Pull out the line. Can be used for long-distance transmission. Among them, the only telephone lines that meet the national standard are all-copper telephone lines.
Part3: Telephone line crystal head connection method Telephone line connection method Q: Kitchen storage and kitchen storage
Phone wire crystal head connection
Two methods: 1. A head: black, green, red, yellow; B head: black, green, red, yellow. 2. A head: black, green, red, yellow; B head: yellow, red, green, black. Both connection methods can be used. The two wires of the telephone line are AC, and there is a rectifier in the phone, which means that no matter how you connect these two wires, the phone will automatically rectify into DC. If it is 4, it is a group of 1 to 4 cores: the Chinese standard is 23, that is, the middle two network cables are connected to the 1236 telephone line, which is 45.
Two-core telephone line crystal connector connection method
One port of the two-core telephone wire, peel off the outermost insulating layer about 0.5 cm, and expose the inner core of the two thin telephone wires. Insert the core into the two slots in the middle of the two-core crystal head, then insert the caliper and clamp it up and down. At this time, the two inner core wires should have been completely connected with the two metal sheets inside the crystal head. . The two-core telephone lines can be connected in any order, as long as they are connected, the four-core dedicated telephone lines must be connected in order.
Four-core telephone line crystal connector connection method
Telephone line crystal head connection The arrangement order of the four inner cores in the crystal head (which can be distinguished by color) is exactly opposite in the two connection methods, as if the two crystal heads are facing away from themselves, The inner core arrangement order on the first crystal head is yellow/green/red/black from top to bottom, then on the second crystal head it should be yellow/green/red/black from top to bottom. Sequence of four-core wires: The black, red, green, and yellow ends are connected in a straight line. The middle two are signal lines, and the two sides are data lines.
Large logarithm cable: The construction of large logarithm cable must first know the main color and secondary color (white, red, black, yellow, purple; blue, orange, green, brown, gray), and then Just line up in order. 100 pairs of cables are divided into four bundles, and each bundle should have white, red, black, yellow, and purple wire pairs. The first group usually calls these pairs of lines first) followed by red-blue, red-orange, red-green, red-brown, red-gray; followed by the 110 patch panel used, after the phone is wired, 2/3 of the phone module is connected That’s right.
Part4: Suggestions for wiring design of home phone and office phone Q: kitchen storage and kitchen storage
Since the indoor parallel lines for telephones are attenuated greatly in long distances, if the house area is large, excessive use If the indoor line is used, the line quality is bound to be affected, especially when ADSL is installed on the telephone line, since ADSL has high requirements on the line, the quality of the Internet access will be greatly reduced. Also, since the wires are already enclosed in the wall, if you encounter any problems with the wires, it is also a hassle to solve. Therefore, planning ahead is very important.
Household phone line wiring suggestions
Before doing network wiring, you should first understand your living room environment and the purpose of each room, and where to open the slot Embedding, where can not be concealed? At the same time, it is necessary to understand the network needs of the family, where to access the Internet? Where to watch TV? Have a number in your own mind. Then determine the location of the distribution box and the splitter according to the location of the power distribution box, cable TV inlet, telephone line, and network cable inlet in the room. Generally, the distribution box should not be moved easily; the wiring box for telephone lines and network cables should be selected in a place that does not affect the appearance and is convenient for operation. Considering that routers and switches are to be placed, a larger wiring box should be designed; The TV is designed with a box that can place two TV distributors at the inlet. It is recommended to draw a design sketch according to your own ideas. Even if you need to change it again, it will be very clear on the map, and it will not have any impact during the construction process.
Office telephone wiring scheme
The telephone network wiring in the office building should be implemented with the goal of being simple, flexible and easy to manage, and the network cable should be in line with the office network The communication standard ensures the high-speed and reliable information transmission requirements of the network, and has a high degree of flexibility, reliability, comprehensiveness, and easy expansion. For open wiring, all socket ports support data communication, voice and image transmission to meet the needs of video conference, multimedia and other systems. It can meet flexible application requirements, that is, any information point can be easily and arbitrarily connected to terminal equipment. All connectors should be modular standard parts to facilitate management and to easily expand the equipment when there is a greater development in the future. It can support gigabit data transmission, and can support Ethernet, high-speed Ethernet, Brand ring network, ATM, FDDT, ISDN and other networks and applications. Effectively connect your business with the outside world while facilitating internal calls.
Is the telephone line exposed or concealed?
Telephone cables, network cables, cable TV cables, audio cables, video cables, audio cables, etc. are all weak current cables. The routing method of weak current cables is almost the same as that of strong current cables, and they also need to wear PVC pipes. It is better that the section of the line does not exceed 40% of the section of the PVC pipe. One more point, don’t wear too much, and strong electricity and weak electricity must not be worn in the same tube. And try to separate as far as possible, the distance between strong and weak electricity is at least 20 cm or more, otherwise there will be interference. In addition, the quality of all kinds of wires is required to be excellent, so as to meet the bottom line of 20 years of normal use.
For indoor installation of open wires, the ambient temperature should not be higher than 35c. Select the wire within the safe current carrying of the wire, and the wire will not overheat. However, when the power consumption exceeds the safe current carrying capacity of the wire, the wire will heat up, and the calorific value of the wire is proportional to the square of the current intensity. cause a fire. Therefore, the wiring must follow the principle of “the live wire enters the switch, and the neutral wire enters the lamp holder”, and a leakage protection device must be installed on the socket. The surface-mounted socket should preferably be no less than 1.8 meters from the ground; the concealed socket should be no less than 0.3 meters from the ground. The sockets in the kitchen and bathroom should be at least 1.5 meters away from the ground, and the sockets in the air conditioner should be at least 2 meters above the ground.
For safety and maintenance convenience, open wire is more and more favored by users, and now there are open wire grooves, and the wires are installed in the wire groove, which looks angular and beautiful. However, there are still hidden dangers. The wires will heat up in the process of transmitting electricity. If a large number of wires are assembled together, if the temperature is too high, it will inevitably cause accelerated aging of the insulator and reduce the service life of the wires. If the wires of high-power electrical appliances are bundled together at the same time, there may be a short circuit caused by the melting of the insulator, resulting in unimaginable consequences. Are the telephone lines exposed or concealed? From the perspective of safety and maintenance, open wire for decoration and wiring is the best choice. First, the wire can dissipate heat in time, second, it is convenient for inspection and maintenance, and third, it saves costs. As long as the wires are arranged neatly and neatly, they will also be beautiful
. If you really want to use hidden wires, you must find a professional electrician, and you can’t just bury the wires in the wall casually. Nowadays, the decoration team is mixed, and the hidden dangers are also “buried”.
Part5: The telephone line needs regular maintenance Q: Kitchen storage and kitchen storage
The length of the service life of the telephone line depends on the quality of the telephone line and the environment in which the telephone line is installed. The telephone line is mainly insulated by the outer layer of the sheath. Over time, it is corroded by corrosive gases, and the insulation performance is gradually reduced, gradually aging and hardening, becoming brittle or falling off.
1. The telephone line should not be damp, heated, corroded or bruised.
2. Pay attention to checking the telephone line after it has been used for a certain number of years. If any fault is found, it should be replaced in time.
3. Do not overload the telephone line.
4. Check the usage of the line frequently, and carry out maintenance and repair in time.
5. If the lines of old buildings are found to be submerged or wetted by water, especially if the lines are in disrepair and aging, please immediately ask an electrician to repair them.
6. For lines that are easily soaked by floods, an electrician should be asked to relocate the lines and take elevated and moisture-proof measures.
7. In case of a power outage in rainy days, the power supply should be cut off immediately, and an electrician should check the reason and send someone to take care of it.
