Automatic multi-tune telephone music on hold apparatus

The telephone music on-hold sound unit for installation on telephone switchboards or responders (10) includes a recording medium, e.g. a compact disc, with musical pieces and/or messages recorded on it. A driver is connected on one side to the switchboard or responder, and to a microprocessor (4). T...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	RAVIZZA, GRAZIANO GIOVANNI, CINISELLO BALSAMO, IT, SALA, STEFANO, CINISELLO BALSAMO, IT, PISANESCHI, GABRIELE, MAILAND/MILANO, IT
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TELEPHONIC COMMUNICATION
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