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Current Detector For Private Branch Exchange Extensions, Trunks And Tie Lines

IP.com Disclosure Number: IPCOM000066500D
Original Publication Date: 1979-Mar-01
Included in the Prior Art Database: 2005-Feb-20

Publishing Venue

IBM

Related People

Authors:
Ferry, M Orengo, G [+details]

Abstract

The circuit shown above is used for detecting the relatively high loop current in the secondary winding of the line transformer in a private branch exchange system (PBX). Although power supply voltage +V is high, about 24 volts, the circuit can be easily integrated.