Mistaken inventory of integrated wiring system

A few mistaken ideas of the integrated wiring system:





One, quality assurance





refers to cabling system quality assurance, each manufacturer has its own unique performance, some provide a number of years of product quality assurance, some provide a number of years of system warranty, and some provide lifelong warranty. There are also different explanations for the content and method of warranty. It is a good thing for domestic users to make a warranty commitment, which means that the manufacturer is responsible for the user. But first of all, users need to know what the "warranty" really guarantees?





first of all, do not give the manufacturer a number of years of product or system warranty, as a guarantee of the number of years before the product is not backward. With the change of human science and technology and the rapid development of communication technology, no one can foresee what will happen in a few years, more than 10 years or even decades, that is to say, the manufacturer's warranty for several years does not guarantee that the system will not be obsolete for a period of time. But the user can be assured that the wiring system itself is a major feature is easy to enlarge and upgrade.





China has a saying: "Foreign monks will chant." Domestic users are very committed to the commitment of foreign companies, that there are many years of quality assurance, you can get how many years of after-sales service and protection. In fact, the wiring system itself is a passive physical connection system, once the installation has been completed and passed the test, generally do not need to maintain, only to be properly managed; So the factory's so-called quality of several years, mainly for its in the project to provide a full range of wiring products in the product itself. For the product quality problem caused by non-human factors, the manufacturer is completely responsible, and the true meaning of after-sale service should be completed by the system integrator responsible for implementing the project. So I think the user should choose the good quality products, through the formal channels provided by the manufacturers to take the goods, and select the domestic reputable, high technology system integrators to the construction, so that they get a reasonable profit, so that users also get these integrators to provide value-added services and after-sale long-term service and quality assurance.





second, reasonable application





wiring System in the newly entered China, has given the people a mysterious feeling, it seems that the building once the wiring system immediately became an intelligent building, and each weak system can use this set of wiring system. Fact Theoretically speaking, the integrated wiring system is to unify the transmission medium of each weak system in the building into a high performance transmission medium, which makes it easy to manage, maintain and expand in the future. But in reality, we cannot and do not need to do so at home. The main reasons are three points:





The cost is too high, the performance may not be very good





such as security monitoring system, the current use of the 75 ohm coaxial cable low price, transmission distance (more than 100 meters), its bandwidth is also very high, and the integrated wiring used in the 8-strand twisted pair has no advantage in this area. First of all, it is limited by the maximum transmission distance of 100 meters, more than 100 meters of its transmitted video signal attenuation will be very large; In addition, the user also needs to buy impedance matching device, so that the interface of the monitoring equipment and twisted-pair system compatible, as well as the building automation and other weak systems have their own wiring system, usually its wiring topology for the general style , that is, in the 2-core line can be series of many control units, and the integrated wiring system is a star-type topology, requiring each 8 core wire can only be one device. This shows that if the building automation and other weak systems also use star-type topology, it will require a large number of cables, so that the whole system costs soar.





the restriction of China's industry management





such as fire protection security system, is still a separate design, separate construction, separate management, such as the use of integrated wiring system is not appropriate.





can not give full play to the advantages of integrated wiring





Cabling System provides great flexibility for users who often change the type and location of terminal equipment, while weak devices such as building automation, security monitoring and so on are almost permanently fixed in a room or corridor and do not need to be constantly changed.





This shows that the integrated wiring system is not omnipotent, it mainly for the intelligent building of high-performance Communication Automation system provides the foundation.





three, Reasonable choice





in the current wiring market, the media and the most hype of the business is the "thousand trillion bit." I remember last year is still hype "Super 5", and this year with Gigabit Ethernet standards in the vicinity, cabling manufacturers have also launched to support Gigabit Ethernet "6" or even "7" wiring system. The introduction of advanced products is a good thing, but I would like to remind domestic users not to be carried away by the manufacturer's hype, in the choice of wiring products calmly to consider whether the need for such high-end system.





In fact, Class 5 and Super 5 systems have been able to meet the transmission requirements of Gigabit Ethernet, and whether it is 622M, 1G ATM or Gigabit Ethernet, currently can only be used as a backbone of the network, and for the real to the terminal level system, I am afraid that the current domestic users very few people can use the real exclusive 10Mbps rate, most of the LAN still use the shared 10Mbps rate of networking. So when a user really wants to transmit data at 1000Mbps at a level to a terminal system, I'm afraid that the Class 6 system is already obsolete. Even if some users now need 1000Mbps transmission rate level to the terminal system, but also to transfer some multimedia information (that is, voice, data and images), which is really some "flak hit mosquitoes" feeling. At present, multimedia information transmission applications (such as VOD, videoconferencing, etc.) on the 25Mbps ATM and 10Mbps Ethernet can be achieved, it is difficult to imagine the user will now use 1000Mbps rate to pass something.





In addition, 6 categories, 7 categories of standards have not been formally introduced, 6 types of system installation specifications and methods are not currently formed, more importantly, 6 or 7 types of systems testing specifications and methods have not yet. Currently commonly used testing equipment is still based on the 100MHZ standard, so even if the user in the project using 6 categories of products, it is not known whether the wiring system used to meet the 6 type of system requirements. What kind of product is 6 products, I am afraid to ask who also said not clear.





Besides, I would like to talk a little bit about my personal views. I think with the rapid development of communication technology, copper cable will eventually be eliminated, the main reason for the elimination is the bandwidth, transmission distance and electromagnetic divergence and interference problems, and instead of it would be optical fiber or even the future of some kind of transmission medium. Data show that all optical networks have emerged in the United States, and 10Gbps of Ethernet has been created in the laboratory. All fiber-optic LANs will be more attractive to both manufacturers and users.