Private branch exchanges for connection to public switched telephone networks run by certain public telecommunication operators. Specification for private branch exchanges with terminating stations treated as an entirety.
NORMA vydána dne 1.9.1998
Designation standards: BS 6450-2:1983
Note: NEPLATNÁ
Publication date standards: 1.9.1998
The number of pages: 19
Approximate weight : 57 g (0.13 lbs)
Country: British technical standard
Kategorie: Technické normy BS