Business Telecommunications (BT); Overall transmission plan aspects of a private branch network for voice connections with access to the public network
NORM herausgegeben am 31.8.1990
Designation standards: ETSI ETR 004-ed.1
Publication date standards: 31.8.1990
The number of pages: 69
Approximate weight : 207 g (0.46 lbs)
Country: European technical standard
Kategorie: Technische Normen ETSI