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EIA/TIA-733-A:2004 High Rate Speech...
EIA-364-62A:2004 (R2010) TP-62A...
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ITU-T X.790 Corrigendum 2 X.790 (1995) Corrigendum 2
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ITU-T E.123 Notation for national and international telephone numbers, e-mail addresses and web addresses
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ITU-T E.502 Traffic measurement requirements for digital telecommunication exchanges
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ITU-T E.191.1 Criteria and procedures for the allocation of ITU-T International Network Designator addresses