KEY TELEPHONE SYSTEM

PROBLEM TO BE SOLVED: To prevent deterioration in control performance for a main device connected to a plurality of key telephones capable of being installed multiple kinds of line status indicators. SOLUTION: The key telephone system comprises a main device 10 and a plurality of key telephones 11 c...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	MIZUNO YUICHI
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY SELECTING
Online-Zugang:	Volltext bestellen
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