1引言近两年来,国内的各大电信运营商都在着力实现从固网运营商向综合信息服务提供商的转型,并且分别实现了在美国、香港股市的上市。在这样一个大的背景下,对于运营商来说,最根本的问题在于如何提高企业的盈利能力,降低网络的建设和运维成本。在运营商的业务模式中,大客户接入是一块重要的利润来源,作为与大客户直接相关的接入层网络就成为运营商在竞争中考虑的重点。接入层网络具有客户数量巨大、节点众多、设备分布广、接入情况复杂等特点,为了能够为大客户提供更好的服务,运营商在对大客户接入解决方案的关注重点包括以下几个方面: 1 Introduction In the past two years, all the major domestic telecom operators have been making efforts to transform from fixed network operators to integrated information service providers and have separately listed the stock markets in the United States and Hong Kong. Under such a big background, the most fundamental issue for operators is how to improve their profitability and reduce the cost of network construction and operation and maintenance. In the operator’s business model, large customer access is an important source of profit, as the access layer network directly related to large customers has become the focus of operators in the competition. Access layer network with a huge number of customers, numerous nodes, equipment distribution, access complex and so on, in order to be able to provide better customer service, operators in large customer access solutions focus on the following Aspects: