A Data And Voice System For The General Service Telephone Network

James D. Mills; Vivek P. Telang; Charles E. Rohrs

doi:10.1117/12.968291

1 January 1987 A Data And Voice System For The General Service Telephone Network

James D. Mills, Vivek P. Telang, Charles E. Rohrs

Proceedings Volume 0858, Signal Acquisition and Processing; (1987) https://doi.org/10.1117/12.968291
Event: IECON, Cambridge, 1987, Cambridge, MA, United States

Abstract

This paper describes a low cost system that simul-taneously provides a data and a voice channel over a standard general service telephone network (GSTN) 2-wire connection. Time domain harmonic scaling (TDHS) [1] is used to frequency compress the voice signal. Data rates up to 1200 bits/s full-duplex have been achieved using a low complexity quadrature amplitude modulation (QAM) algorithm. A real-time implementation has been built using three TMS32010 DSP chips for full-duplex operation.

Citation Download Citation

James D. Mills, Vivek P. Telang, and Charles E. Rohrs "A Data And Voice System For The General Service Telephone Network", Proc. SPIE 0858, Signal Acquisition and Processing, (1 January 1987); https://doi.org/10.1117/12.968291

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