A private branch exchange, and a method for selectively communicating a central processing unit with respective modules connected to the private branch exchange

A PBX (1) comprises a central processing unit (2) for controlling the PBX (1). A plurality of modules (6) for facilitating expansion of the PBX (1) at respective selectively addressable primary locations (4) through plus and socket connectors (7,5) and communicate with the central processing unit (2...

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Bibliographische Detailangaben

Hauptverfasser:	BALLOCH DAVID, BYRNE ANTHONY J, CUNNINGHAM KENNETH, WARWICK GRAHAM, SAMARDZIC SASA, O'CONNOR JOHN P M, O'BYRNE TONY, PURCELL JOHN, GALLAGER SEAMUS, KELLY CIARAN, CARROLL MARTIN J, O'KEEFFE MICHAEL NOEL, YOUNG SEAN, ENDA SULLIVAN
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY SELECTING TELEPHONIC COMMUNICATION
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