Public Switched Telephone Network (PSTN); Signalling System R2; Conversion between analogue and digital versions of line signalling [CEPT Recommendation T/CS 42-04 E (1984)]
NORM herausgegeben am 15.3.1996
Designation standards: ETSI ETR 252-ed.1
Publication date standards: 15.3.1996
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: European technical standard
Kategorie: Technische Normen ETSI