July 11, 2019
It's fundamental to have a keypoint to do everything, to those point too common to ignore. What we try to tell you is few important elements that must be followed in the FTTH project. While those key points were implemented, project were half succeed so far. Understanding those points will also enhance the construction speed and get a good access for furture upgrade and expansion. The elements to be followed in the FTTH project are as follows:
1, the location of the spectrometer location
In passive optical networks, the location of the spectrometer plays a crucial role in the implementation of the project. The spectrometer is an passive device that does not require power to work properly. Therefore, there are not many concerns about site selection and installation. It is only necessary to pay attention to the pipeline and user distribution. The location of the spectrometer installation is generally not placed in the computer room. It is usually selected in a light distribution box that is closer to the user and the surrounding users are more dense. If the spectrometer is installed in the computer room for centralized spectroscopic, the advantages of PON are not reflected at all.
The correct location of the spectrometer installation location can bring the following advantages:
1) Save room to fibre-optic distribution box cable investment
Reasonable location determination of spectrometer can greatly save the investment of optical cable. Take a 24-core cable as an example. If the spectrometer is installed in the computer room, the 24-core cable is only used to connect the computer room with the user's distribution box. Only 24 users can be opened. However, if it is used to connect the central computer room with an outdoor spectrometer, it can cover 1536 households according to the 1:64 spectroscopic ratio. In other words, if properly installed, a 24-core cable can be used instead of a 1536-core cable.
2) Save room space and improve management functions.
The light separator installed outdoors can save space in the engine room.
2, the location of the computer room
In a pure FTTH project, up to one computer room may be required. Because the construction of the computer room involves power acquisition, management, operation, backup power supply, air-conditioning, etc., it will greatly increase the construction costs and operating costs. Normally, the operator will not set up the FTTH room in any cell unless the nearby computer room is too far away from the user. At present, operators usually install optical distribution boxes or fiber optic cable headboxes in the cell at most.
3, centralized spectroscopic
Operators usually perform centralized spectrophotometry outdoors near users. This is a kind of protection for investment, and the expansion of the spectrometer can be carried out according to the user's opening situation. In other words, when the number of users in the early period is relatively small, you can buy a little less light splitter, and with the opening of the number of users, the number of light splitters will gradually increase. However, it is recommended to consider enough space for expansion when designing in the early stages.
4, reduce the type of cable
In order to facilitate implementation and management, more than two types of optical cables(excluding incoming optical cables) will not be used in a well-designed passive optical network. This cable mainly refers to the center room to the user distribution box. In Rosenberg's completed project, only two optical cables can be used from the central computer room to even the floor distribution box. Reducing the type of fiber optic cable is conducive to improving the length of the fiber optic cable that needs to be used, and it is conducive to manufacturers 'ability to provide rapid response and price competitiveness.
5, easy to expand
At present, the spectroscopic ratio of EPON or GPON can indeed be 1:64, in other words, a PON of the local device can have 64 users. And according to the standards of 10G-EPON and 10G-GPON, the spectroscopic ratio will reach 1:128. However, in the current implementation of the operator, the spectroscopic ratio will not be directly achieved 1:64 in the project. The usually used spectrometer is 1:32. Using a 1:64 spectroscopic ratio means that the average bandwidth of EPON can only reach 16M per user.
If users generally need to increase bandwidth, they will appear to be stretched. According to the high-definition digital TV standard, the conservative bandwidth required to achieve 1080P level program transmission on the network is 22M. If according to the current full configuration, when the user generally requests to increase the bandwidth to 20M or 30M, the existing network can not meet the needs at all, and it is necessary to upgrade the active network equipment to 10G network. Upgrades must result in waste of existing assets and huge reinvestments. Therefore, under normal circumstances, it is still recommended to consider the use of 1:32 optical splitter by users, which can effectively extend the useful life of the current network and bring better investment returns to customers.
A good plan must be targeted at identified projects and tailored to the needs of developers and owners. A good plan is a network that is easy to implement, easy to maintain, easy to upgrade and expand, and fully enhance the effective period of investment. Professional FTTX scheme providers can provide users with professional pre-consultation and post-sales training guidance services. Customized services make the overall project plan from design to implementation process so that customers do not have the best care and maximize system value.
The key elements that the FTTH project must follow are the above five. Readers should consider these five factors when implementing the FTTH project to improve the quality of the project.
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