Private branch exchanges for connection to public switched telephone networks run by certain public telecommunications operators. Specification for ports.
STANDARD published on 15.12.1993
Designation standards: BS 6450-4:1993
Note: WITHDRAWN
Publication date standards: 15.12.1993
The number of pages: 162
Approximate weight : 517 g (1.14 lbs)
Country: British technical standard
Category: Technical standards BS