ITU-T Recommendation E.191 Series E: Overall network operation, telephone service, service operation and human factors. Operation, numbering, routing and mobile services – International operation - Tones in national signalling systems. B-ISDN addressing

ITU-T Recommendation E.190 Series E: Overall network operation, telephone service, service operation and human factors… Principles and responsibilities for the management, assignment and reclamation of E-Series international numbering recources ITU-T Recommendation E.184 Telephone network and ISDN. Operation, numbering, routing and mobile service. Indications to users of ISDN terminals ITU-T Recommendation E.183 Series E: Overall network operation, telephone service, service operation and human factors. Operation, numbering, routing and mobile… Tones in national signalling systems. Guiding principles for telephone announcements Covering note ITU-T Recommendation E.191 (03/2000) B-ISDN addressing. Corrigendum 1 ITU-T Recommendation E.191.1 Series E: Overall network operation, telephone service, service operation and human factors. International operation… Criteria and procedures for the allocation of the ITU-T International Network Designator addresses ITU-T Recommendation E.193 Series E: Overall network operation, telephone service, service operation and human factors. Operation, numbering, routing and mobile services… Numbering plan of the international telephone service. E.164 Country Code expansion