According to the investigation of the authoritative organization, in 2004, there are 73%~80% in the network Fault in the physical link layer, at present 30%-40% network fault occurs in the physical layer, and the data Link layer and network layer, because of the application of network development, assume more network health status assessment. Therefore, the integrated wiring manufacturers should not only have a complete cabling product line, but also to consider what the user needs a kind of information access. They need a fully integrated, standard information path, a manageable network resource, and a long-term, healthy network. From the factory to the user therefore need some testing equipment and services to help cabling the smooth implementation and application of the project. To this end, according to the famous manufacturers Agilent technology has the most complete test product line, we believe that a comprehensive wiring manufacturers and integrators should provide the following services, in order to ensure that the network in the initial period of time, the user framework for a long-term healthy network, in order to reduce the network operating costs to a minimum.
1. From the electrical performance test, R&D cable development test. Products from the production line, because the material and process reasons, can not guarantee that all products can have a unified physical parameters and performance indicators, a small number of even below the standard requirements. At this point, the products for users, each box line will cause a number of channel unqualified, so the manufacturer must be proportional to the production line from the cable on the DCM detection, and the test report, attached to this batch of products for user reference. The DCM system is a kind of medium cable tester which is widely used at present, its test sample rate is high and the precision is high, the test result can reflect the performance of the measured cable well. This system can be used by several different products of Agilent Vna including e506x,e507x and 87XX.
The test results are listed as follows