ETSI ETR 203-ed.1

Public Switched Telephone Network (PSTN); Messages and formats for push-button dialling [CEPT Recommendation T/CS 28-01 E (1980)]

NORMA vydána dne 15.9.1995

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The information about the standard:

Designation standards: ETSI ETR 203-ed.1
Publication date standards: 15.9.1995
The number of pages: 7
Approximate weight : 21 g (0.05 lbs)
Country: European technical standard
Kategorie: Technické normy ETSI