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宽带城域网是根据业务发展和竞争的需要而建设的城市范围内的宽带多媒体通信网络,是宽带骨干网络在城市范围内的延伸,并作为本地的公共信息服务平台组成部分,负责承载各种多媒体业务,为用户提供多种接入方式,满足各类用户对各种多媒体业务的需求,因此,宽带城域网必须是
Broadband Metropolitan Area Network (MAN) is a city-wide broadband multimedia communication network constructed according to the needs of business development and competition. It is an extension of the broadband backbone network in the urban area and is a component of the local public information service platform. It is responsible for carrying various Multimedia services, to provide users with a variety of access methods to meet all kinds of users of various multimedia services needs, therefore, broadband metropolitan area network must be