BS 6450-6.1:1993 PDF

Published Date: 02/15/1993

Private branch exchanges for connection to public switched telephone networks run by certain public telecommunications operators. Simple call-routeing mode (SCRM)-Specification for the simple call-routeing mode of PBX operation, with terminating stations treated as an entirety

Published Date: 09/30/1988

Private branch exchanges for connection to public switched telephone networks run by certain public telecommunication operators. Simple call-routing mode (SCRM).-Specification for the simple call-routing mode of PBX operation, with terminating stations treated as an entirety

Published Date: 02/15/1993

Private branch exchanges for connection to public switched telephone networks run by certain public telecommunications operators-Specification for private branch exchanges with terminating stations treated as an entirety

Published Date: 05/20/2009