Modems and Dialers

  • William J. Barksdale
Part of the Applications of Communications Theory book series (ACTH)


Over the last two decades there has been a dramatic increase in the amount of data transmitted between computers and remote terminals. Although in some cases digital channels are specially constructed to carry data, it is generally much simpler and more economical to use the existing telephone plant. The “telco” is familiar and reliable, and connects the vast majority of locations where computers and terminals might be located. Consequently, both the volume and the percentage of digital telecommunications traffic is steadily increasing and will soon overshadow the voice traffic. This is one of the main reasons that telephone companies worldwide are converting to digital transmission as fast as is economically feasible.


Federal Communication Commission Quadrature Amplitude Modulation Gray Code Telephone Line Differential Phase 
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    A. L. Wedgman, Serial interface autodialer protocol, Comput. Design 20, 17–31 (1981).Google Scholar
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    B. Widrow, J. M. McCool, M. G. Larimore, and C. R. Johnson, Jr., Stationary and nonstationary learning characteristics of the LMS adaptive filter, Proc. IEEE 46(8), 11511162 (1976).Google Scholar

Suggested Readings

  1. J. R. Davey, Modems, Proc. IEEE 60 (11), 1284–1292 (1972).CrossRefGoogle Scholar
  2. R. Glasgal, Basic Techniques in Data Communications, Artech House, Dedham, Massachusetts (1977).Google Scholar
  3. W. J. Barksdale, Understanding the fundamentals of line equalization, Data Commun. 8 (5), 107–117 (1979).Google Scholar
  4. S. U. H. Quershi, Adaptive equalization, Proc. IEEE 73 (9), 1349–1378 (1985).CrossRefGoogle Scholar
  5. IEEE Journal on Selected Areas in Communications (Special Issue on Voiceband Telephone Data Transmission) 2(5) (1984).Google Scholar

Copyright information

© Plenum Press, New York 1986

Authors and Affiliations

  • William J. Barksdale
    • 1
  1. 1.South TEC AssociatesHuntsvilleUSA

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