ETSI ETR 251-ed.1

Public Switched Telephone Network (PSTN); Signalling System R2; Digital line signalling [CEPT Recommendation T/CS 42-03 E (1985)]

NORMA vydaná dňa 15.3.1996

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The information about the standard:

Designation standards: ETSI ETR 251-ed.1
Publication date standards: 15.3.1996
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: European technical standard
Kategória: Technické normy ETSI