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 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 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 E.104 Telephone network and ISDN. Operation, numbering, routing and mobile service. International telephone directory assistance service and public access CCITT Recommendation E.105 Telephone network and ISDN. Operation, numbering, routing and mobile service. International telephone service ITU-T Recommendation E.106 Series E: Overall network operation, telephone service, service operation and human factors. International operation – General provisions concerning Administrations. International Emergency Preference Scheme (IEPS) for disast...