TELEPHONE SET

PURPOSE:To discriminate the feeding stage depending on a ring back tone by sending a low frequency natural ring back tone at application of commercial power supply and sending a high frequency ring back tone such as a ceramic ringer at power failure. CONSTITUTION:If an incoming call is detected at t...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	HIYAMA TAKAHIRO, OOTSUKA YOUJI, OKAZAKI SAIICHI, FUKUSHI TOSHIO, NAKATO YASUSHI
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TELEPHONIC COMMUNICATION
Online-Zugang:	Volltext bestellen
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