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NZS 1900.11.2:1985A1
ITU-T Y.1311
ITU-T T.66
ISO 3203:1993
ISO 5057:1993 (R2014)
ITU-R S.1556-0
ISO 8280:1993
ITU-T V.42
ITU-T V.92 AMD 2
ITU-R S.1554-0
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