Private branch exchanges for connection to public switched telephone networks run by certain public telecommunications operators. Specification for general requirements.

UNGÜLTIG herausgegeben am 15.2.1993

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.

UNGÜLTIG herausgegeben am 1.9.1998

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.

UNGÜLTIG herausgegeben am 15.2.1993

Private branch exchanges for connection to public switched telephone networks run by certain public telecommunication operators. Direct dialling in on private branch exchanges. Specification for direct dialling in on private branch exchanges with terminating stations treated as an entirety.

UNGÜLTIG herausgegeben am 15.1.1993

Private branch exchanges for connection to public switched telephone networks run by certain public telecommunications operators. Specification for ports.

UNGÜLTIG herausgegeben am 15.12.1993

Private branch exchanges for connection to public switched telephone networks run by certain public telecommunication operators.Facilities on private branch exchanges. Specification for facilities on private branch exchanges with terminating stations treated as an entirety.

UNGÜLTIG herausgegeben am 30.9.1988

Private branch exchanges for connection to the British Telecommunications public switched telephone network. Facilities on private branch exchanges. Specification for facilities on private branch exchanges with terminating stations treated as an entirety.

UNGÜLTIG herausgegeben am 15.2.1993

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.

UNGÜLTIG herausgegeben am 30.9.1988

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.

UNGÜLTIG herausgegeben am 15.2.1993

Private branch exchanges for connection to public switched telephone networks run by certain public telecommunication operators. Specification for the procedure of in-service observation for PBXs undergoing type approval.

UNGÜLTIG herausgegeben am 30.9.1988