Simultaneous voice and data on the general switched telephone network using framed QADM

Author

Bremer, Gordon ; Ko, Kenneth D.

Author_Institution

Paradyne Corp., USA

Volume

34

Issue

12

fYear

1996

fDate

12/1/1996 12:00:00 AM

Firstpage

58

Lastpage

63

Abstract

Considerable effort has been expended to allow voice to be transmitted over a general switched telephone network (GSTN) connection simultaneous with modulated data. A new transmission technology for this purpose is introduced-framed quadrature audio/data modulation (framed QADM)-in which voice and data channels are combined as an integral part of the modulation process. The basic technology is described and two implementations, which are at different levels of maturity for standardization within the International Telecommunications Union (ITU), are presented. Finally, system attributes are discussed for framed QADM as they compare to other technologies

Keywords

audio signals; data communication; quadrature amplitude modulation; standardisation; switching networks; telecommunication channels; telephone networks; voice communication; ITU; International Telecommunications Union; QAM; audio signals; data channels; framed QADM; framed quadrature audio/data modulation; general switched telephone network; integrated voice-data transmission; modulated data; quadrature amplitude modulation; standardization; transmission technology; voice channels; Bidirectional control; Communication standards; Digital modulation; Modems; Quadrature amplitude modulation; Space technology; Standardization; TV; Telecommunication switching; Telephony;

fLanguage

English

Journal_Title

Communications Magazine, IEEE

Publisher

ieee

ISSN

0163-6804

Type

jour

DOI

10.1109/35.556488

Filename

556488