当我国税务系统网络从原有的总局、省局、市局、县局四层三级网络发展到总局、市局、省局、县局、乡所的五层四级网络系统的时候,本着“按需组网”的原则,结合税务系统用户数量、应用业务的开展、管理维护、资金投入等主要因素,清华同方采用全系列交换机产品开发了针对省级税务以及各级国 When China’s tax system network from the original General Administration, the provincial bureau, city bureau, county bureau four-tier three network development to the administration, municipal bureau, provincial bureau, county bureau, township five-tier four network system, this Based on the principle of “on-demand networking”, combining with the main factors such as the number of tax system subscribers, the application of services, management and maintenance, and capital investment, Tsinghua Tongfang has developed a series of solutions for provincial taxation and all levels of government