Comprehensive analysis of issues that should be paid attention to during the test of the Integrated Wiring System

There are many things worth learning about the test of the Integrated Wiring System. Here we mainly introduce the issues that should be paid attention to during the test of the Integrated Wiring System, including the selection of test standards and the selection of "third-party testing.

Testing of 5-class and 6-class integrated wiring systems is the most widely used Integrated Wiring System in systems above 1000 points, it is widely used in cabling systems of office buildings, campus networks, campus networks, various smart buildings, and smart communities. It has even been widely used in automated production systems and Industrial Ethernet. Because the actual data bandwidth of various applications is not high, unless the quality of the system is indeed very poor, the common quality problems and even serious quality problems of most systems are generally hidden, generally, it may take several years or even more than a decade before being exposed. At this time, the quality tracing period has expired. Most users can only enable redundant links and temporary repair and repair to maintain the upgraded bandwidth application, or simply decommission the original system and re-wiring it to solve the problems left behind in the early stages. Replacing the system in advance will result in budget losses. Due to the time required for re-wiring, many users pay more attention to the lost business time and related profits.

Test Standard selection

For small networks, five types of Integrated cabling systems are generally used for testing. After the laying is completed, the construction engineer usually performs a disconnection test (check whether the eight indicators on the tester are on ), or perform a small batch disconnection test during construction. If there is no problem, you can "Submit. Currently, all such applications can be fully supported only by 10 M Ethernet (three lines can be used). Therefore, users often cannot find hidden quality problems in the cabling system, it is impossible to determine whether the network cabling system meets the requirements of the five types of systems by only performing a disconnection test. Even serious quality problems will not be exposed immediately. Most of the problems will be discovered only after several years of application with large bandwidth, however, HD format and large-bandwidth video applications are not widely used yet. At the same time, the speed of Internet bandwidth expansion is quite slow compared with the demand of network users, the lag of man construction restricts the promotion speed of local high-speed bandwidth video applications. According to this optimistic estimation, the fastest time for users to discover serious quality problems in the cabling system is 3 ~ Five years later.

For medium-and large-sized networks or small-and medium-sized networks with high reliability requirements, the planners generally have some quality inspection knowledge for testing integrated wiring systems, some users are even familiar with the test standards for Integrated Wiring quality acceptance such as GB 50312-2007. Because of its complex network structure, although not all of them, some users consume a large amount of bandwidth, such as VOD privileged users, especially medium-sized users with datasets, because the quality of the data center is high and the application speed is fast, only testing the disconnection cannot guarantee that the link can meet the requirements of these applications.

So, do we not need to perform quality inspection on small networks and Common User links? Of course not. Most of the problems for small users are that they are in a very passive position in the quality assurance system, because they do not understand the quality inspection acceptance standards, how to accept the Integrated Wiring System is generally "passive" to listen to the opinions of system integrators and engineering contractors (Party B) and installation engineers, as long as the cable link is connected, it indicates that the link quality is qualified.

No matter whether it is a small network user or a large or medium-sized network user, as long as you simply grasp the testing standards and testing methods and insist on the quality inspection of the finished network, you can easily control the construction quality of the wiring system. Because the testing instrument can automatically carry out acceptance tests according to the standards to determine whether the test results are qualified, you do not need to have a thorough understanding of the standard parameter types, definitions, compliance requirements, and other details.

There are three general-purpose standards for acceptance testing of Integrated Wiring in China: TIA568B (2002), GB 50312-2007, and ISO 11801 (2002 ), the proportion is distributed around 90%, 5%, and 4%, totaling about 99%. Other 1% of users may use "Application-based standards" for testing.

Selection of "third-party testing"

According to a survey by Fluke, medium-sized networks with over five types of systems (500 ~ There are still 1500 of the networks in the 30% cabling links. Only simple connectivity tests are selected, and tests are not performed according to the acceptance test standards. However, 93% of the six types of systems in large and medium-sized networks have chosen the acceptance test. In the acceptance test, the test results often lead to "interpretation disputes ".

For example, if the test results of a 6-class link with a length of M is "qualified", the technical staff of Party A's data center intuitively think that this link is only about 70 m long, it was impossible to have 105 m at all. Therefore, a retest was required. The result showed that the length was 73 m. Party A further suspected that all the test reports provided by Party B had problems. Therefore, Party A invited a third-party organization to conduct the test, the test result shows that both the length and parameters of the test result are not equal to the No. (Party B calculates the length of the cable link and charges the installation fee). The pass rate is not 87% provided by Party B, but 99%, party A requires that all links of the system be retested.

After Party B completes the installation, Party B will generally provide Party A with a self-testing report for all cable links. Some Party A will classify the self-testing report as the inspection data in the acceptance report as the acceptance document. However, because the test report is an electronic version, some Party A may have doubts about the authenticity of the test report, so they chose a third-party test. A third-party test can be conducted in part or independently by a third party. In order to ensure data accuracy, the ratio of the National Standard GB 50312-2007 is generally no less than 15%, and the number of less than 100 items starts with 100. The method for determining whether the Integrated Wiring System is qualified is: if the pass rate of the testing object is not lower than 99%, It is inferred that all the cabling systems are qualified. If the pass rate of the tests is lower than 99%, all tests are required, not just tests, to determine the final pass rate.

Some users not only entrust a third party for sampling or full inspection, but also require the third party to help propose rectification suggestions and measures for the unqualified link, and instruct Party B to diagnose and fix faults until the final test is accepted. At this time, the third party is not only the identity of the Acceptance tester. To a certain extent, the third party is bound with the interests of Party B. This seems easy for Party, however, the "neutral" of a third party will be seriously weakened, and many large-scale hidden quality incidents will be triggered.

1. Generic Cabling FAQ Manual
2. Detailed description of the selection of the Integrated Wiring System and the specifications of the Integrated Wiring Project
3. Review the development of the cabling system and its future prospects
4. The Integrated Wiring market is growing rapidly.
5. Important issues of Integrated Wiring System in Grounding