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ITU-T E.410 International network management - General information
ITU-T E.450 Facsimile quality of service on public networks - General aspects
ITU-T F.1 Operational provisions for the international public telegram service
ITU-T F.170 Operational provisions for the international public facsimile service between public bureaux (Bureaufax)
ITU-T E.180/Q.35 (03/98) Technical characteristics of tones for the telephone service
ITU-T E.166/X.122 (03/98) Numbering plan interworking for the E.164 and X.121 numbering plans
ITU-T F.18 Guidelines on harmonization of international public bureau services
ITU-T E.155 International Premium Rate Service
ITU-T E.456 Test transaction for facsimile transmission performance
ITU-T E.154 International Shared Cost Service
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