| Cable TV network,a typical representatives of broadband networks which is regard imitating technology as the subject, begins to develop before the computer network appears, and it has made very great contribution in the course of information dissemination. With the development of society and the improvement of people's requirements to information service individualizedly day by day, the modern society has put forward the new demand to the information network in the broadband, interaction, intelligence and Ability to bear the weight of integrated service, etc. whether it could keep up with the developing steps of the information technology and satisfy to the request of the social development increasing constantly rapidly, will concern the network survival and development under the keen competition situation day by day of information industry of cable TV in the future. In order to adapt to this trend, the wired broadcast and television networks of countries all over the world are carrying on the corresponding transformation.There are abundant physics network resources in the cable television network of Changde (optic fibre network)and the largest number of potential users of network (cable TV users), this article proposes the construction scheme step by step by stages on the basis of the analysis about the data business market demand of broadband at present in Changde and that analysis of current situation of the cable TV network of Changde at present in Changde,and utilizes the advanced, ripe, reliable network technology: It adopts IP Over Optical technology to structure the high-speed key network of cable TV broadband which equipment and network management complexity is low; extra expenses are small, efficiency to transmit is high, the cost price is low, it adopts powerful WINDOWS NT network management software as Land network systematic network management platform of broadband city of cable TV;it adopts the multi-level, omni-directional online security solution, and adopts the access technology of Ethernet and Cable Moden technology as the main access way of the land net of the city, and introduces VPN business and realizes which users of group of enterprises and institutions inserted; On selecting the type of the equipment, it selects the biggest networking products company in the world for use mainly —the products of Cisco Company: The centre equipment adopts Catalyst6509 exchanger of CISCO, as the exchange centre of the whole land network data platform of broadband city of cable TV of Changde,which has an outstanding expansibility and the rate of performance / price , and can support the extensive density of interface, performanceand high usability to select; CISCO7507 router which is regarded as the key node that the flow of the network charged in the platform and realized VPN business, it combines Cisco's effectual software engineering and remarkable dependability, usability, service ability and performance characteristic, and can meet the most key Internet's demands at present ;The equipment where optic fibre gathers together and contact adopt CISCO WS-2950-24; INTERNET export from consideration on being safe, disposes CISCO PIX515 fire wall .because it can offer unprecedented safe protection ability. The series of CISCO products have offered the unified, high-efficient network management operation and management for cable TV broadband IP backbone network in Changde, and make Cable TV broadband IP backbone network in Changde rises to new generation telecommunication competence of network service, thus set up basic network platform of a new generation taking broadband IP technology as the core of various kinds of business networks of realization with interconnected that can offer safe and reliable VPN service and Internet at a high speed inserted and interconnected LAN, structure one powerful investing in low , payback high , protected well to make the investment, cost performance quite high broadband city land network.The land network of broadband city of cable TV of Changde is typical of Changde,and suits th... |
