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Proceedings Paper

A Data And Voice System For The General Service Telephone Network
Author(s): James D. Mills; Vivek P. Telang; Charles E. Rohrs
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Paper 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.

Paper Details

Date Published: 1 January 1987
PDF: 6 pages
Proc. SPIE 0858, Signal Acquisition and Processing, (1 January 1987); doi: 10.1117/12.968291
Show Author Affiliations
James D. Mills, Tellabs, Inc. (United States)
Vivek P. Telang, Tellabs, Inc. (United States)
Charles E. Rohrs, Tellabs, Inc. (United States)

Published in SPIE Proceedings Vol. 0858:
Signal Acquisition and Processing
Russell J. Niederjohn, Editor(s)

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