BUSINESS TELECOMMUNICATIONS (BTC). ORDINARY QUALITY VOICE BANDWIDTH 4-wire analogue leased line (A40). Connection characteristics and network interface presentation.
NORMA vydaná dňa 20.11.1997
Designation standards: UNE-ETS 300451:1997
Publication date standards: 20.11.1997
The number of pages: 35
Approximate weight : 105 g (0.23 lbs)
Country: Spanish technical standard
Kategória: Technické normy UNE