County Area Informatization On Network Planning And Technical Solutions

County Area Informatization is important component part of the National Informatization, alsoit is the important means to promote the county economic development. County AreaInformatization Network（CAIN） is the county information technology infrastructurethis paper, Ipresent the technical planning and network solutions about the County Area InformatizationNetwork.County Area Informatization Network is computer networks with broadband IP technology.Generally it can be classified three levels：the core layer, access layer and clustering layer.Unified IPaddress allocation, reliable access authentication and billing management, comprehensive networkmanagement and security management are integral parts in County Informatization Networksplanning. Based on SDH, telecommunications Ethernet, ATM and other business networkingplatforms for the technical analysis, the paper explains County Area Informatization NetworkAccess layers such as LAN, XDSL, WLAN, NGN, PON and Integrated Access suitable for the rural.In addition to providing access to individual users, commercial users internet with fiber optics andVPN technology is the key topic of County Area Informatization Network. For example, county’seducation informatization network, and the county’s rural informatization network planning andconstruction, the paper analyzes County Area Informatization Network.On the underlying network, County Area Informatization Network is transforming fromexisting broadband business to next generation network evolution including gradually functionalintegration, a flat structure, centralized control, Business Development flexible.