ITU-T D-series Recommendation – Supplement 2 Series D: General tariff principles. Charging and accounting in international telecommunications services. Method for carrying out a cost price study regional tariff groups

ITU-T D-series Recommendation – Supplement 1 Series D: General tariff principles. Charging and accounting in international telecommunications services. Cost and tariff study method ITU-T Recommendation D.606 R Charging and accounting in international telecommunication services. Preferential rates in telecommunication relations between countries in Africa Рекомендация МСЭ-Т D.604 R Серия D: Общие принципы тарификации. Рекомендации для регионального применения – Рекомендации, применимые в Африканском регионе. Последний международный центр транзита оплачивает трафик ITU-T D-series Recommendation – Supplement 3 Series D: General tariff principles. Supplement 3: Handbook on the methodology for determining costs and establishing national tariffs ITU-T Recommendation E.100 Telephone network and ISDN. Operation, numbering, routing and mobile service. Definitions of terms used in international telephone operation ITU-T Recommendation E.104 Telephone network and ISDN. Operation, numbering, routing and mobile service. International telephone directory assistance service and public access