Three kinds of modes to construct broadband access network

In the first half of this year, China's data communications related business grew rapidly, and reached a considerable income scale. It is precisely based on the rapid development of this field, telecom operators in recent years to actively build broadband network, at present, broadband access network has become an important part of the construction. But under the complicated telecommunication network environment, how to construct the broadband access network in local conditions? With this problem, the reporter recently visited the harbor network. The experts of the Harbor network point out that three kinds of models are suitable for the construction of China's broadband access network.
One of the modes: complementary end-Station networking patterns
Harbor experts pointed out that, because China Telecom, netcom and other telecommunications operators have a large number of copper resources, so DSL broadband access technology has become the focus of today's construction. However, the switching mode of PSTN network makes the construction mode based on end-station become the main mode of broadband access network. A few years ago, China's Telecommunications exchange network has been transformed, so that the current Exchange network to show a large capacity of the characteristics of less bureau. In this network environment, the Broadband access network construction also must adapt to this characteristic.
ADSL Technology and VDSL technology are two kinds of mainstream DSL technology at present, but these two kinds of technology have each characteristic. ADSL technology can provide far more coverage, about 3. 5 km, but its bandwidth is narrower, the upper and lower bandwidth asymmetry, and its low output rate, even after the new laying of copper cable is only about 30% of the outgoing rate. The bandwidth of VDSL is high, it can realize symmetrical transmission from top to bottom, its outgoing rate is higher, but its transmission distance is shorter, only about 1. 5 kilometers. In view of this situation, in the end Bureau of the network mode, should use complementary way to build access network.
Harbor experts believe that, in the current situation, through ADSL and VDSL mixing technology, to achieve the two mainstream access mode in the integration of equipment, ADSL and VDSL is the best way to combine. This construction model not only has ADSL and VDSL Unified network management, unified operation, unified sharing port, simplifying the advantages of network structure, but also in accordance with the user's distribution, bandwidth requirements, transmission distance, line quality status and many other objective factors flexibly choose ADSL and VDSL access technology, To achieve cross coverage of different users. In fact, the industry's ADSL and VDSL mixing technology has been very mature, the Beijing Bay network HAMMER10000IP Access switch on the use of pure Ethernet core technology, so that ADSL and VDSL Business board fully share the same set of backplane and switching control network, VDSL and ADSL to achieve the same box mixing function, at present the equipment has been on the market scale commercial.
Mode two: Flexible edge networking mode
Due to the defects of ADSL technology itself, resulting in 3. Within the range of 5 km ~5 kilometers, there is a problem that the terminal ADSL can't cover the area and the poor quality of the line causes the broadband to be unable to cover, these areas become the "blind zone" of ADSL access. In general, these ADSL access "blind area" users are relatively few, in these "blind spots" within the small capacity of ADSL equipment is clearly the best choice. The small capacity ADSL equipment can solve the problem of low output rate and low transmission rate of long-distance by connecting the abundant fiber resources in the city with the close end station.
On the other hand, with the rapid development of county and township economy and the general increase of income of rural residents, the demand for broadband data services in these areas is also growing rapidly. ADSL will gradually extend to county, township and other areas. These regional markets tend to be far away, the number of users is less, the environment is worse, if the use of large capacity of equipment will result in excessive investment, maintenance and management of complex, low rate of number, investment recovery difficulties. Therefore, the use of flexible small-box ADSL access equipment to become the best choice.
Harbor Network for the current large capacity Adsldslam construction mode is not suitable for the edge market, there is a high initial investment, occupy more room area, deployment is not flexible, low rate of the status quo, launched the HAMMER3300IP uplink box-type Adsldslam equipment. It can be cascaded in 4 units, support the single point of expansion to ensure the flexible expansion of user development; hammer3300 IP Technology architecture to avoid the high cost of ATM network construction and expansion, it also seamless support IP multicast business and provide uplink hundred trillion (electric port or optical port), support wire speed forwarding, There is no uplink bandwidth bottleneck. Hammer3300 has a fast and flexible layout, does not occupy the room area, integrated low-cost access, can improve the number of release rate and many other advantages, more suitable for the broadband edge market, including urban "broadband Blind Zone", county, township, etc., can better support the development of broadband edge market operators.
Mode three: The comprehensive model of Vdsl+lan
In the construction of the broadband metropolitan Area Network in the past two years, some operators have chosen the way of Ethernet access, but because the broadband market has not yet formed the scale, which leads to low rate of release and low rate of investment recovery, the waste of equipment resources and bandwidth resources is caused. In some neighborhoods and buildings, there are two twisted-pair resources and 5 types of line resources coexist, how to use the existing network resources and reduce its operating costs? The Vdsl+lan model of the Harbor network is proposed.
Harbor experts pointed out that if the user residential building has twisted twisted-pair line, you can use the Bay Network VDSL Uplink Ethernet switch μhammer1008v through five types of direct access to users. μhammer1008v uplink VDSL, the maximum bandwidth is 12. 5 trillion, downlink 8 Ethernet port, users do not need to buy vdslmodem, directly using five types of line access network card can achieve broadband access. This way is flexible and convenient, not only can save the user cost, but also can effectively use the original telephone line and twisted-pair resources, fully protect the operators have investment, facilitate the operators to quickly develop flexible broadband access, rapid occupation of the market. and μhammer1008v support remote power supply and local power supply two ways, with far-supply equipment μhammerrps24v can be achieved through the twisted pair of remote power supply, far from the distance of up to 750 meters, thoroughly solve the corridor-level equipment local access to electricity difficulties, the user's electricity billing complex, switch noise pollution, High failure rate of equipment.