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Chinese Standard: GB/T 17789-1999

Procedures for simultaneous transmission of data and digitally encoded voice signals over the PSTN or over 2-wire leased point-to-point telephone type circuits

EQV  ITU-T V.70:1996

邮电部电信科学研究规划院

This standard is the original Chinese electronic standard.
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If you need translation, please contact email: ChineseStandardsLibraryS001@gmail.com.

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