GB/T 7557-1987

General characteristics complying with the network performance objectives for 300 channel carrier telephone systems on standardized 1.2/4.4mm coaxial cable pairs

NORM herausgegeben am 26.3.1987

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The information about the standard:

Designation standards: GB/T 7557-1987
Note: UNGÜLTIG
Publication date standards: 26.3.1987
Country: Chinese technical standard
Kategorie: Technische Normen GB