PreCONNECT & reg;

After reviewing the network development process, people feel that the development of the network is changing with each passing day, and the development of the network is updated almost every five years, the continuous development of network applications puts forward higher bandwidth requirements to people. With the operation of Gigabit Networks, in our traditional cabling system, copper systems can only be used for end users. In the face of such circumstances, more and more cabling system designers and end users are using optical fiber cabling products in their cabling networks, which are incomparable advantages of optical fiber copper products, as fiber cabling continues to appear in the trunk cabling system, it is also gradually entering the Smart Community and desktop applications.

In a cabling system, the transmission media is like a road or bridge in a transportation network. Only when it operates securely, stably, and reliably, it is vital that information is transmitted between different parts. If the reliability of this component is uncertain, then the network operation on this basis becomes even more uncertain. Therefore, the most basic condition for safe network operation is to ensure the reliability and effectiveness of the transmission media, and to ensure the high performance of the components connected to the network and the good matching between the components, minimize information loss and provide sufficient transmission capacity to meet application requirements today and tomorrow.

Whether it is 5e or cat6 copper cable networks or optical fiber networks, insertion loss, return loss, and noise interference are generally the main factors affecting network performance. Of course, the decline in network performance caused by the mismatch between various types of connectors also belongs to the above factors. Here, we will only discuss the optical fiber network.

In the network using optical fiber cabling, the general process of various major Optical Fiber suppliers is relatively stable and the product quality is high, therefore, most of the characteristics of optical fiber cables and various optical fiber connectors, jumpers, pigtails, and other components are relatively stable, most of the reasons that may affect the quality of the optical fiber network will converge on the optical fiber connection technology. Below, we can discuss several commonly used optical fiber connection technologies:

1. Fusion mode: Optical Fiber fusion is a widely used method at present. Relatively speaking, fusion is a method with a high success rate, but it cannot be questioned that, the welded joint is one of the main factors that are easy to be damaged or fail. Therefore, its security is also a problem we need to consider. After all, in the future use and maintenance process, equipment in the cabinet is often maintained. Under normal circumstances, welding can produce a small loss, which is generally less than DB, but the return loss control is not so easy, and it cannot be concluded from the OTDR display directly, in addition, there are many external factors that affect the fusion quality during the optical fiber fusion process, such as environmental conditions such as temperature, wind power, and dust) the operation proficiency includes preparation of the optical fiber end face, aging degree of the electrode rod), matching of the optical fiber and pigtails, matching of the optical fiber type, and matching of the optical fiber manufacturer, if you use MTP and other multi-core band optical fiber connectors that are currently not used in China, the band optical fiber melting splitters will not be able to avoid the fact that the loss of individual optical fiber cables is too large during the welding process. Besides, experience tells us that, the actual loss value of the weld must be tested. When the number of Optical Fiber cores is large, it will be accidentally damaged or even broken. In the test phase, if the test results are unsatisfactory or fail to meet the standards, you need to pick them out and then rework them. After the network is used, in the event of a network cabinet or terminal that needs to be moved and has to interrupt all the fused optical fiber cables, re-weld the cables in the new location, and so on; all the above possibilities, it makes us have to think about how the fusion method can be used. For security.

2. Cold connection or on-site connection to optical fiber connectors: for the on-site connection mode, anyone who has worked in factory processing and production of optical fiber products should be very familiar with this, on-site grinding and factory manufacturing are two completely different methods that cannot be compared. The factory adopts five grinding processes from coarse to refined for special grinding machines, on-site manual grinding is impossible to adjust pressure and maintain consistency. In traditional low-speed networks, even if the above loss exceeds the standard, the return loss is too small, and the connection is unstable, it is irrelevant to the network, because optical fiber has enough abundance to digest the impact of these factors in transmission, many technical indicators are extremely sensitive in today's demanding networks, it may be a few meters away, so the network designers or constructors may have a headache. After the construction, the loss may occur when the network design requirement is exceeded and the test fails. As a result, the project cannot be completed on schedule, the system design is changed, or the route is reselected.

After the above construction and installation conditions, in order to solve the problems existing in the welding mode, it makes construction, network maintenance and use more reliable and stable, and system changes easier to operate. PreCONNECT, a pre-connection technology developed by rosenberger, Germany®), According to the actual needs of the site, you can select ordinary PVC or LSZH non-smoke halogen-free) indoor or outdoor optical fiber cables, pre-connection optical fiber cables using special branch components, the bare fiber in the optical fiber cable at the output end into tensile,

The 3.0 or 2.0 optical fiber cable that is under pressure is used to eliminate the damage or security impact on the optical fiber link caused by various uncertainties during the construction and use of the optical fiber network to the maximum extent, to ensure the security of the network and meet the design requirements.

Compared with the traditional optical fiber terminal, the pre-connection technology adopts the optical fiber connection mode instead of the connection mode. According to the customer's requirements, the factory directly installs the optical fiber connector at the end of the optical fiber cable and performs standard program grinding. All technical indicators comply with IEC, TIA and related standards. In this regard, the on-site connection technology cannot be compared with it. At the same time, the optical cable structure is different from the current widely used in China. 9mm. 0mm. an indoor soft optical fiber cable consisting of a 0mm optical fiber. Its structure is a two-core to 144-core center bundle tube or multi-Bundle Tube Layer twisted indoor or outdoor optical fiber cable, this ensures that the optical fiber cable has sufficient mechanical properties. At the same time, the beam tube oil filling structure also ensures the use environment and water resistance characteristics of the optical fiber cable. in the optical fiber cable, the use environment and water resistance are reduced from 250 μm bare optical fiber. 0mm the transition is still the same optical fiber, and there is no welding or other mechanical connection mode. This avoids the adverse results caused by welding, grinding, or other end connection methods, make sure that you have obtained the optical fiber products without any possible additional factors specified by the test indicators, making the network design or construction easier to control. In addition, due to the pre-connection using special optical fiber branch components), the optical fiber can be firmly fixed in the dedicated rack 2), to ensure that the tension distribution box of 50kg is not deformed, the optical fiber link between the two ends of the connector is always in the free and relaxed state, does not directly affect the performance of the optical fiber because the outer skin of the optical fiber cable is squeezed, stretched, or inadvertently pulled, maximize the security of the optical fiber network and the investment of the owner.

We can see from the above structural features that this technology can pre-install all currently common fiber optic connector types, and it is more advantageous for the multi-core MTP connector as mentioned above, this completely eliminates the impact of various unfavorable factors in the band optical fiber connection, so that users can achieve the desired application results.

Speaking of this, many colleagues who have experience in construction and installation will certainly ask: "Is there a problem in the installation process of the optical fiber connector installed at both ends of the optical fiber cable ?" This is what we will do next. At the same time of product R & D, we have designed and installed protective tubes for special optical fiber cables. Their functions are as follows: first, ensure that the optical cable can withstand sufficient strength when installed in the pipe or bridge, and the sealing structure ensures the dust and water resistance during installation. Therefore, during installation, it can be dragged like in the past construction without causing any damage to optical fiber and optical fiber cables. The protection levels are IP50 and IP67 respectively.

Finally, the advantages of the pre-connection mode are also reflected in the improvement and upgrade of the network, as we described earlier, because the rapid development of network applications will inevitably lead to changes in the network structure and re-planning, but in the past, traditional methods could not solve these problems well, and the result is often caused by too much trouble, the structure of the data center after expansion is unreasonable, and the use and maintenance become complicated and cumbersome. The features of the pre-connection method solve this problem. If the network terminal moves or the path is changed, you don't have to interrupt the original optical fiber as in the fusion mode. You just need to select a proper time to interrupt the network and remove the pre-connection Optical Fiber splitter from the rack. In the new location, after the rack is installed, re-connect the optical fiber splitter to the rack and fix it. The whole process takes only several minutes.

Since the application of the pre-connection method in China, it has been applied in the design and construction of optical fiber networks for many telecom operators, finance, education, public security, customs, enterprises, and science and technology parks in China, at the same time, it also won high praise from the end customers, which also gives us more confidence in our products, we hope that more users can have optical fiber networks with convenient construction, high security, and outstanding performance, because we always believe that the basic physical layer of the network is one of the most important parts, with a highly secure and reliable foundation, more exciting and outstanding network applications will be available.