美利体育登录入口官网:ITU-T D.286-1996
全球虚拟网业务(GVNS)的计费和结算原则 系列D:一般资费原则 一般资费原则-智能网(IN)支持的电信业务
Charging and Accounting Principles for the Global Virtual Network Service - Series D: General Tariff Principles General Tariff Principles - Charging and Accounting Principles for Intelligent Network Supported Services Study Group 3; 11 pp