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