Accession Number : ADB013378

Title :   Two/Four Wire Digital Subset.

Descriptive Note : Final technical rept. Jun 74-Jun 76,

Corporate Author : NORTH ELECTRIC CO GALION OH

Personal Author(s) : Hagstrom, Kenneth ; Kiley, Philip J. ; Snyder, Don ; Godbole, Vishwas R.

Report Date : JUL 1976

Pagination or Media Count : 136

Abstract : This experimental hardware of a two/four wire digital subset was designed and fabricated for use to test, evaluate and demonstrate technical feasibility of simultaneous full duplex digital communications (voice and data), at 16 and 32 Kbps, over a pair of conductors (2 wires) heretofore only possible over 2 pair of conductors (4 wires). Technical/operational feasibility was successfully demonstrated over 4 kilometers of wire without any degradation of voice quality. Test results support conclusions that a 2-wire line transmission circuit can be shared for accommodating simultaneous full duplex voice/data communications with the same performance obtained over 4-wire circuits in a more cost effective manner (ratio of 2-1 cost reduction in outside cable plant facilities). (Author)

Descriptors :   *DIGITAL COMMUNICATIONS, *INFORMATION THEORY, *VOICE COMMUNICATIONS, *DUPLEXERS, *TRANSMISSION LINES, *ELECTRIC WIRE, *DATA TRANSMISSION SYSTEMS, .

Subject Categories : Electrical and Electronic Equipment
      Cybernetics
      Voice Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE