Accession Number : ADD012076
Title : Low Voltage Two Wire to Four Wire Telephone Circuit Converter Apparatus.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC
Personal Author(s) : Pacini,Dino J ; Miceli,Edward C ; Sturdevant,Norman J , Jr
Report Date : 19 Nov 1985
Pagination or Media Count : 5
Abstract : 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 in parallel to receive a receive data in signal 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 : *PATENTS, *ADAPTERS, *TELEPHONE SYSTEMS, DATA LINKS, FIBER OPTICS, DIGITAL SYSTEMS, ANALOG SYSTEMS, LOW VOLTAGE, GROUND LEVEL, WIRE, RINGS, SIGNALS, AMPLIFIERS, CHANNELS, CONSTANTS
Subject Categories : Non-radio Communications
Distribution Statement : APPROVED FOR PUBLIC RELEASE