ITU-T Recommendation E.112 Telephone network and ISDN. Operation, numbering, routing and mobile service. Arrangements to be made for controlling the telephone services between two countries

ITU-T Recommendation E.111 Telephone network and ISDN. Operation, numbering, routing and mobile service. Extension of international telephone services ITU-T Recommendation E.110 Telephone network and ISDN. Operation, numbering, routing and mobile service. Organization of the international telephone network ITU-T Recommendation E.109 Telephone network and ISDN. Operation, numbering, routing and mobile service. International billed number screening procedures for collect and third-party calling ITU-T Recommendation E.113 Series E: Overall network operation, telephone service, service operation and human factors. Operation, numbering, routing and mobile services - International operation – General provisions concerning Administrations. Valida... ITU-T Recommendation E.114 Telephone network and ISDN. Operation, numbering, routing and mobile service. Supply of lists of subscribers (directories and other means) ITU-T Recommendation E.116 Series E: Overall network operation, telephone service, service operation and human factors. Operation, numbering, routing and mobile services - International operation – General provisions concerning Administrations. ...