Ground start and tip ground detection without the use of -48V or tip bait circuit

A loop detector circuit for detecting the loop current of a telephone circuit in a ground start mode and a normal mode which obviates the need for a separate TIP ground detector circuit. A pair of light emitting diodes (LED) 52, 54 are associated with a photoelectric device, such as a phototransisto...

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Bibliographische Detailangaben

Hauptverfasser:	CAREY, BRIAN ROBERT, FENN, THOMAS
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TELEPHONIC COMMUNICATION
Online-Zugang:	Volltext bestellen
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