In recent years, China's telecommunications market, the trend of shrinking fixed-line business, and broadband preached strong momentum, users demonstrate IPTV, video surveillance, smart home and other diverse business interests. Faced with this market background, operators will focus more into the development of broadband services, the "light of Copper," a consensus-building access networks, EPON, with its flexible networking, business to provide strong, mature technologies advantages as operators "of Copper Light" construction technology of choice. EPON equipment currently used in China reached 10 million lines, the large-scale applications into the fast lane. EPON-based FTTx construction mode of the more reasonable choice of development model is the operator of network construction cost savings and enhance the value of the critical network.
"Light of Copper" construction mode
"Light of Copper," refers to the operator of network construction model from the traditional copper-based access-based to fiber optic cable access, so cable as close to the user, and eventually fiber to the home. But out of cost, network status and other factors into account, China's "Light of Copper" building model to FTTB, FTTN / V-based, FTTH scale applications take some time. The Internet from the physical group, mainly three modes for the cable end position, length, and single-node access to copper covered range of different users, FTTH realized "all-optical access, full free copper", a node corresponds to a user , users receive the bandwidth and the operational capacity of the strongest, but the construction cost is quite high; FTTB to achieve a "fiber to the floor, no floor copper" cable operators to extend into the building, and access nodes deployed in the corridor, through the node cover business needs of all building users, the user access bandwidth capacity remains high and business is the main plot for the new solution; FTTN / V is basically a "fiber to the district (village), no cell of copper (Village) "cable operators to deploy to the area (village) within the district (village) set the little room or outdoor cabinets or even only one node to realize the whole district (village) within the user's business coverage, their access bandwidth, and operational capacity is relatively weaker, but can be nearly 2 to 3 years to meet customers business needs, is in suburbs and rural areas "light into the copper out" of mainstream solutions. The Either way, EPON have become the main means of technology.
FTTx building programs in New Urban Area
New urban areas, based on EPON fiber to the building (FTTB) building model into the operator's choice, that is, laying fiber to the cell corridor, the corridor ends placed inside the copper ONU (OpticalNetworkUnit) equipment, ONU to provide LAN or DSL interface users, broadband access, while built-in IAD for voice access. From a cost point of view, FTTB the construction mode can save cable, room or outdoor cabinets of investment costs; from the access rate to consider, FTTB can provide users with more than 20M even as high as Fast access bandwidth; projects, ONU equipment deployment In the corridor, can be laid directly to the developers received ONU equipment inside the building corridor copper jump box patch panel, reduce the difficulty of the second jumper works. Corridor within the ONU according to the broadband equipment LAN or DSL access ports using different ways, FTTB building can be divided into FTTB + LAN, and FTTB + DSL two, two access modes on the number of users inside the building wiring and cover requirements vary . Select City FTTx building programs shown in Table 1, network program shown in Figure 1. Multi-layer and high-rise buildings
And high-rise buildings on the multi-carriers used in the building of multi-LAN access, the reason is that the average per-port Ethernet interface ONU cost is low (less than DSL), can provide users with higher business access bandwidth, while avoiding the cost of the MODEM terminal increase. FTTB + LAN-building model to be considered a priority issue is the device port rate of real equipment, due to the relatively fixed ONU device port (currently the industry's LAN mode for FTTB ONU provide at least eight Ethernet port), when a small number of cell users, equipment brought by unit placed port caused the low rate of real equipment capital cost per user increased. I am China Manufacturers writer, reports some information about ladies straw hat , ladies sun hat.
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