Public Switched Telephone Network (PSTN); Alternative sender for multifrequency signalling system to be used for push-button telephones [CEPT Recommendation T/STI 46-04 E (1986)]
NORMA vydaná dňa 15.9.1995
Designation standards: ETSI ETR 207-ed.1
Publication date standards: 15.9.1995
The number of pages: 17
Approximate weight : 51 g (0.11 lbs)
Country: European technical standard
Kategória: Technické normy ETSI