Accession Number : ADD011449
Title : Low Voltage Two Wire to Four Wire Telephone Circuit Converter Apparatus.
Descriptive Note : Patent Application,
Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC
Personal Author(s) : Pacini,D
Report Date : 08 Mar 1983
Pagination or Media Count : 14
Abstract : This abstract describes a low voltage two wire to four wire telephone circuit converter apparatus utilizing a series pair of amplifiers to provide a transmit data out signal that is referenced to analog ground. A pair of amplifiers is in parallel to receive data in single which is referenced to analog ground and apply it to the telephone unit. A signal adapter converts the telephone ring signal to a constant one level for transmission over a digital channel in a fiber optic link.
Descriptors : *Patent applications, *Adapters, *Telephone systems, Constants, Data links, Fiber optics, Amplifiers, Channels, Digital systems, Low voltage, Analog systems, Ground level, Rings, Signals
Subject Categories : Non-radio Communications
Distribution Statement : APPROVED FOR PUBLIC RELEASE