ITU-T D.140 SUPP 2-2003
国际电话业务的结算费率原则 系列D:一般资费原则 一般资费原则: 国际电话服务的计费和结算原则
Accounting rate principles for the international telephone service; SERIES D: GENERAL TARIFF PRINCIPLES General tariff principles Charging and accounting in the international telephone service; Supplement 2: Updated teledensities and indicative target set