Telephone noise fault solution

In the summer, there was a lot of rain in Beijing, which also brought us trouble in our work. Usually there is very little rain in Beijing. If heavy rain occurs in summer, it is difficult to discharge large amounts of rain. As the saying goes: When water goes low, if there is a lot of rain, the capacity of the sewage well is limited, the water will flow to the lower, and our weak current Pipe Well is usually about 3 meters away from the sewage well. This is not because the shower volume is sufficient, and the weak current Pipe Well enters the water. We can only wait until the weather is fine to pump water, and some calls may be noisy. First, let's first introduce that the weak current Pipe Well is mainly divided into BAS and CAS + OAS, BAS pipe wells mainly include air conditioning control systems, power distribution control systems, lighting control systems, elevator control systems, and water supply and drainage control systems) fire alarm and linkage control system, parking lot management system, security monitoring system, public broadcasting system, etc.; AS + OAS Pipe Well including information automation system CAS), office automation system OAS) line, current Weak Current pipe wells are mainly composed of optical fiber cables, telephone lines, fire-fighting lines, and broadcast and audio. Most of them are close to the strong electric well for lighting control and power control of power equipment. The design of the Weak Current pipe well should be taken into account, and the layout of the weak electric pipe, wire trough and water, electricity, and wind system pipe, wire trough and pipe should be designed in a unified manner. Cables, pipe lines, and cable trough in the weak current system shall not conflict with the wind pipes, water pipes, mechanical and electrical equipment, and strong electrical cabling, and shall choose a reasonable layout and direction suitable for the installation of various equipment in the building, to save engineering investment. The Integrated Wiring Design for the Weak Current system is required. In addition to horizontal positioning, vertical installation dimensions and sufficient space, the open pipe and cable slot must be considered for continuity and integrity of the pipe and cable slot, it is necessary to ensure the overall implementation of the embedded jobs of hidden embedding pipes and cable slots. For the carrier of hidden embedding tube and cable trough: the surface layer of the ground, top floor, and wall column, the civil engineering design should have sufficient embedded size. For a large area of plane, the thickness should also have uniformity requirements. The electrical control box that is connected with the weak current system should design the introduction Opening of the Weak Current cable and the terminal block in the cabinet, and clearly mark the working voltage of the strong and weak current electrical appliances. Lines of mechanical and electrical equipment controlled by the fire control subsystem should be carefully checked and properly connected to ensure accurate control. Through the inspection of Weak Current pipe wells, after we ruled out water accumulation, the telephone noisy fault still exists. It seems that we are in trouble. From the fault perspective, we can basically determine that the telephone line is damaged somewhere, normally, it does not affect normal use. once soaked in water, this may lead to phone noises. The telephone is a big logarithm line, that is, the local communication cable. It is suitable for telephone system cabling connections with 2-core/4-core telephone branch lines and 4-to-50 pairs of trunk lines ), it is used for the transmission of electrical signals at a lower frequency generally not greater than 1 MHz ). The indoor telephone communication cable is used for the connection between the floor cabling system in the communication system. It can also be used for the connection between the communication outlet (information outlet) and telecommunication equipment, such as telephone and fax, use Shielded Cables in areas with severe interference. 4-to-4 pairs of communication cables for large logarithm scenarios ~ 50 pairs) for the establishment of trunk lines between communication system floors and the connection and wiring between telephone program-controlled switches, the use of digital cable standards for the production of twisted-pair pitch, reducing the interference between the line and the mutual crosstalk, in this way, the crosstalk attenuation of cables is reduced, and the power loss is small, meeting the needs of communication systems for digital transmission to the future, such as digital phones. With the development of the communication industry, three types of digital communication cables are also mainly used as telephone lines for the connection of telephone voice systems. Generally, the group's telephone and telephone switches use 50 pairs of large numbers and 100 pairs, which are certainly no problem within 1200 meters. The PBX switch will be used even further. Our solution is to collect information about the phone with a noisy call, perform a test in the data center at both ends of the phone, and then perform a disconnection test on the distribution frame to determine the point corresponding to the distribution frame at both ends, because we use the majority of 100 pairs, and the workload is considerable, it took us a whole morning to complete the disconnections test at both ends of the data center. From the summary of the wiring diagram of the distribution frame, we compare the number distribution at both ends, migrate the problematic line to the surplus line, and jump the number in the PBX, in this case, we initially completed the telephone repair work for problems with noises. Let the user's problem be solved first, and we will do a lot more work next. Take a photo of the scene, write down the entire handling process, and give constructive comments. As this problem is the first time, we mainly want to check all the weak current pipe wells, seal well covers with poor sealing, and check them again after each rain. Although we would like to fundamentally solve the problem, we also need to take into account the impact of the problem and the expenses incurred.

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