ITU-T Recommendation E.171 Telephone network and ISDN. Operation, numbering, routing and mobile service. International telephone routing plan

CCITT Recommendation E.170 Telephone network and ISDN. Operation, numbering, routing and mobile service. Traffic routing ITU-T Recommendation E.169.3 Series E: Overall network operation, telephone service, service operation and human factors… Application of Recommendation E.164 numbering plan for universal international shared cost numbers for the international … ITU-T Recommendation E.169.2 Series E: Overall network operation, telephone service, service operation and human factors… Application of Recommendation E.164 numbering plan for universal international premium rate numbers for the international … CCITT Recommendation E.172 Telephone network and ISDN. Operation, numbering, routing and mobile service. ISDN routing plan CCITT Recommendation E.173 Telephone network and ISDN. Operation, numbering, routing and mobile service. Routing plan for interconnection between public land mobile networks and fixed terminal networks ITU-T Recommendation E.174 Telephone network and ISDN. Operation, numbering, routing and mobile service. Routing principles and guidance for universal personal telecommunications (UPT)