As a large and medium-sized enterprise, in a city office area and factory buildings are usually not adjacent to each other, it may be a few kilometers or dozens of kilometres apart; we are doing a good job in the office building, especially the Central computer room (Information Center) wiring system, but also the factory workshop in the workshop cloth line, office area and the factory area how to interconnect, Is that we plan and design factory park wiring network must consider the matter, how to make the factory park wiring network long-term stable work, and facilitate the future development needs to have scalability; This is another problem to be solved in the wiring system planning, this article is to discuss the wiring way from the factory to the information center.
First, the factory park wiring Network design principles
1. Practicality
After implementation of the communication wiring system, not only now but also in the future can adapt to the continuous development of technology, and the realization of data communication, voice communication, image communication transmission.
2, expansion of
Cabling systems can be expanded to allow for greater development in the future, and it is easy to expand the device. The system has good scalability and scalability, so that the investment in the construction of this period will be protected after the future upgrade and expansion.
3, Advanced
The use of advanced international technology, so that the design of wiring system in a high starting point, the system adopted by the system structure and selection of equipment should have the international advanced level, with development potential, in the rising trend. The system design has a certain advance, the technical starting point is high, the life cycle is long. ---http://bianceng.cn (computer science)
4, high-speed nature
The system can process and transmit multimedia information, take the optical cable to compose the network, try to improve the throughput of the network. At the same time, the CLIENT/SERVER structure model should be adopted to reduce the overhead of network communication resources.
5. Reliability
With sufficient reliability redundancy, backup storage capability and fault tolerance, it is necessary to ensure that the system can run stably for a long time, so that the influence of the fault is localized, and the network design should be advantageous to the analysis and elimination of the fault.
Second, the factory park fiber wiring System
We know that from the factory to the information center of the wiring is generally more than the maximum distance of twisted-pair wiring 100 meters, so the use of optical cables for wiring. With the increasing of the speed of LAN and the increasing demand of network bandwidth, optical fiber is more and more widely used in LAN because of its incomparable advantages in bandwidth and attenuation. In the wiring system, a true optical fiber solution not only includes optical fiber sockets, optical cables, fiber wiring racks and optical fiber jumper and other passive components, but also should include optical emission/receiving modules, fiber hubs and other active equipment.
1, optical fiber and cable types of choice
Optical fiber communication, refers to the transmission of voice, image and data signals, such as modulation on the optical carrier, optical fiber as a transmission medium communication mode.
Single-mode optical fiber adopts center glass core to teach fine (core diameter is generally 9 or 10μm), only one pattern of light can be transmitted. The mode colors is very small, suitable for long-distance communication, but its chroma dispersion plays a main role, so that single-mode fiber has a high requirement for spectral width and stability of light source, that is, the spectral width should be narrow and the stability is better. The transmission distance of 1000mb/s fiber is 550m-100km.
Multimode Optical fiber uses center glass core to teach coarse (50 or 62.5μm), can transmit a variety of modes of light. However, the modulus of colors scattered large, which limits the frequency of transmission of digital signals, and with the increase in distance will be more serious. , Multimode fiber transmission distance is relatively near, generally only a few kilometers. The transmission distance of 1000mb/s fiber is 220m-550m.
The most widely used optical fiber in network cabling are 62.5μm/125μm multimode fiber, 50μm/125μm multimode fiber and 9μm/125μm single-mode fiber, and we can select single/multimode fiber according to the rate and distance of transmission.
Tie the fiber into a bundle, outside the protective shell, the middle of the cable, which is called the optical fiber; According to the different application environment, the cable can be divided into indoor and outdoor cable.
Indoor cable
Outdoor cable
Factory Park Wiring Network in the factory to the information center of the distance between the general use of outdoor optical cable, office area (Information Center) and factory buildings at both ends of the use of indoor cable.
2. Optical fiber connector
The optical fiber connector is a removable (active) connection between the optical fiber and the optical fiber. It is the optical fiber of the two end of the precision docking, so that the emission of optical energy output fiber to the maximum coupling to the receiving fiber, and because of its interference optical link to the system caused by minimizing the impact, this is the basic requirements of optical fiber connectors. To a certain extent, optical fiber connectors also affect the reliability and performance of optical transmission systems. Product dimensional precision, repeatability, interchangeability good, reliable and stable. Excellent temperature stability, can be used in optical fiber communication systems, optical data transmission, LAN, fiber optic sensors and optical fiber CATV.
Fiber Optic connectors
3. Fiber Connector Plug
The optical fiber connector plug is an accessory of the optical fiber connector, and it is also an important part to realize the optical fiber active connection. It implements the active connection of the optical fiber with the fiber adapter.
Fiber connector plugs can be divided into FC-type, SC-type, LC-type, ST-type, such as a series of fiber connector plugs to meet the needs of customers fiber wiring. With high dimensional accuracy, good repeatability, high reliability and stability, excellent temperature characteristics, low insertion loss, high echo emission loss can meet the requirements of TIA and IEC performance.
Fiber connector Plugs
4, Optical fiber jumper
The fiber jumper's according to the connector shape can be divided into: FC, SC, ST, LC, etc. according to the core of the grinding method can be divided into: PC, UPC, APC, etc. according to the type of fiber can be divided into single mode, 50/125 multimode, 62.5/125 multimode and Thousand trillion, Wan Shao, etc. according to the diameter can be divided into: 900μm, 2mm, 3mm and so on. Products have good interchangeability, repeatability, reliable and stable. High echo attenuation, low insertion loss, length free choice, good temperature stability, can be applied to optical fiber communication systems, optical data transmission, LAN, fiber optic sensors and fiber-optic CATV.
Fiber jumper
5. Optical socket
Fiber sockets are designed for the optical fiber to the work area desktop, wall application of the terminal socket box, its internal left enough disk fiber space to ensure the fiber's disk fiber radius, can be installed ST-type adapters. The disk fiber radius is 80mm. White, material for PC.
Optical socket
6. Fiber Distribution Frame
Optical fiber distribution frame is for the outdoor optical cable, vertical backbone cable and network equipment to provide interconnection or cross connected and used, generally divided into 19 "Cabinet fiber optic junction box, wall-hung fiber-optic junction box and many other forms."
19 "Cabinet with fiber-optic wiring box to provide fiber-optic splicing tray, adequate disk fiber space to ensure the bending radius of the cable." Drawer-type design, the overall structure is reasonable, easy to operate. Shell selection of high-quality steel plate production, beautiful appearance. Compatible with ST,SC,FC,MTRJ and LC and many other forms.
Fiber Optic wiring Frame
The wall-mounted fiber-optic distribution frame is suitable for the split-fiber wiring of 2-16-core optical fiber system. The internal supply of fiber optic cable disk space, but also provides the outlet cable disk fiber space. The minimum diameter of the optical fiber is ensured, which is suitable for St, SC and LC adapters. Flexible installation, door and box with a split-body installation, especially suitable for the use of small space between the lines. The shell is made of high quality steel plate. The installation board can select 12-core and 16-core St, SC-type adapters.
Fiber Optic wiring Frame
Note: ST, SC, FC fiber optic connectors are the early development of different enterprises, the standard, the use of the same effect, each have advantages and disadvantages. ST, SC Connector connectors are commonly used in general networks. The St head inserts after the rotation half week has one card mouth to fix, the disadvantage is easy to break, SC connector directly plug, use is very convenient, the disadvantage is easy to fall out; FC Connector head General Telecommunications network, there is a nut screwed to the adapter, the advantage is reliable, dust-proof, the disadvantage is that the installation time is slightly longer.
The MTRJ fiber jumper is made up of two high-precision plastic-shaped connectors and optical cables. Connector external parts for precision plastic parts, including push-pull Plug and pull card clamping mechanism. It is suitable for indoor application in telecommunication and data network system.
Therefore, we should choose optical fiber connectors and plugs, fiber jumper, optical fiber sockets and fiber wiring racks for fiber cabling products according to the actual needs.
Third, the factory park fiber wiring construction method
Factory Park Wiring network backbone cable generally used pipeline laying, direct burial and overhead, such as laying way, the choice of different sections of optical cables see the following table:
Graphic
Laying methods for different locations
1. Aerial cable
Aerial cable is mainly used for flat terrain and small undulation area. Aerial cable mainly hangs in the steel strand and self-supporting two kinds of hanging way, at present, the basic use of steel stranded wire support. Its laying way is through the Rod road puppet hangs or bundles (winding) erection.
Hanging overhead optical Cable is currently the most used optical cable overhead mode, its main laying way there are three kinds, namely pulley traction method, rod under the traction method and the pre-hook traction method. According to the following work flow of aerial cable line erection construction.
Working flow of aerial cable
2, Pipeline Cable
Pipeline cable is commonly used in urban areas of the local trunk line, the pipe is plastic pipe or cement pipes inside the tube. Pipe road By the more complex, so that the cable tension, lateral pressure is irregular. Most of the urban underground pipelines have stagnant water and silt, before the cable is laid to dredge and clean the pipeline.
The laying of optical cable in the local telephone pipe and the laying of long-distance cable in the plastic pipe are shown in the following figure:
Graphic
Pipeline Cable Work Flow
The laying method has two kinds of mechanical traction laying and manual traction laying, and the mechanical traction laying has three kinds of traction methods, concentrating, dispersing and intermediate auxiliary.
When the piping is complex, the traction machine cannot be used or the traction machine is not available, the cable laying can be completed by manual traction. Manual traction needs to have good command personnel, so that the front of the central traction of people and everyone in the hole auxiliary traction of the people as far as possible synchronous traction.
3, directly buried cable laying
The long-distance trunk line cable project mainly uses the direct buried laying. The main characteristic is that it can prevent all kinds of external mechanical damage, and after reaching a certain depth, the ground temperature is stable, which reduces the influence of the temperature change on the optical fiber transmission characteristics, thus improving the safety and transmission quality of the optical cable.
As the direct-buried cable is widely used for wide field laying, suitable for mechanization or a lot of people at the same time construction, so the length of the cable disk can reach 2~ 4km, reducing the cable connectors, is conducive to reducing the total line loss, but also to the optical fiber cable put forward higher requirements. According to the following direct-buried cable line laying work flow construction.
Summary:
Factory Park Wiring Project is more complex, how to meet the existing needs of the situation, to ensure the stability and scalability of the wiring project is also very important, wiring after the completion of the project, wiring network maintenance is equally important.
