Several Ways Of Building Intercom Transmission
1. Data signal transmission technology commonly used in general building intercom systems
In the current building intercom system, because of the processing cost and technicality, the baseband chip transmission technology is widely used for audio and video, and the signal is generally transmitted in the form of RS485. Therefore, the general building intercom system generally uses four coppers. The transmission technology of core cable (one audio cable, two power cords, one grounding line) plus one monitoring video line. This kind of data signal transmission technology has twisted wires, complicated wiring, short data signal transmission distance, increased cost, and difficult wiring and adjustment. The serial connection network method increases the transmission distance of the power distribution line, and also increases the probability of the above occurrence. Once a common failure occurs on the Internet, it can take as long as half a day, and more often, it will take a few days before the system can be repaired under the cooperation and guidance of the manufacturers. Managers of property companies rely excessively on manufacturers for the protection of intelligent systems. Once the manufacturers’ service items cannot keep up, it will have a lot of adverse effects on the community’s property services. According to "China Property Market Report", today’s smart communities Within five years, there will be 35% system hemiplegia, and 30% of the system will work abnormally, and only more than 20% of the system can be used normally.
2. The wiring method generally adopted by the multi-stage building intercom system
One is the screw riveting method for the stock backlog power cords. The advantage is that the crimping wiring is more reliable. However, there are many wirings, and it is very easy to connect the wrong wiring, especially the installation, adjustment, and maintenance of the system provide a lot of inconvenience.
The other is to use the air-to-connect connector to open the interface method. It is an interface method that uses the upper air interface to develop. Although the installation and disassembly of machinery and equipment are faster, which is beneficial to adjustment, equipment maintenance, management, and overhaul, it is not suitable for applications in areas with high temperature and environmental humidity. When the temperature is high, the metal material connector connected in the air is very easy to be oxidized in the air and grow mold, which leads to poor contact and increases the failure rate of the system equipment. Many engineering project cases have confirmed that in some high temperature, high and low temperature areas, the faster It occurs in half a year, but it can be as slow as one to two years, and the common faults above will double.
3. Wiring method selected by the system
For the signal transmission of the system, the Internet and machinery and equipment are all connected components specially designed for dual cable television networks. The connectors are stable and reliable, with good airtightness, excellent interception of power lines, not easy to grow mold, and connection Easy to plug and unplug. Waterproof cable joints for outdoor use will not cause other common faults in the route if they are thrown into the water for a long time.
