GB/T 7556-1987

General characteristics complying with the network performance objectives for 60 channel carrier telephone systems on symmetric cable pairs

NORMA vydána dne 26.3.1987

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The information about the standard:

Designation standards: GB/T 7556-1987
Note: NEPLATNÁ
Publication date standards: 26.3.1987
Country: Chinese technical standard
Kategorie: Technické normy GB