Data under voice communications system

Details Data under voice communications system Data under voice communications system

1981-09-03

1984-01-10

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 21, 370 19, 370 93, 3701104, 340534, H04J 600, H04L 900

Patent

active

044256612

ABSTRACT:
A communications system capable of simultaneously transmitting voice and data information. The spectral energy of the data signal is smeared by spreading it in a spectrum with energy packed in the lower frequency range under the conventional voice signal frequency in a manner which complements the standard C-message weighting curve. The use of the spread spectrum technique also eliminates thumping at the data rate since the harmonics that produce thumping are also spread throughout the bandwidth.

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patent: 4231113 (1980-10-01), Blasbalg
patent: 4234874 (1980-11-01), Saya
patent: 4313197 (1982-01-01), Maxemchuk
patent: 4328554 (1982-05-01), Mantione
patent: 4328579 (1982-05-01), Hashimoto et al.
National Telecommunications Conference, Wash., D. C., Nov. 1979, vol. 1, pp. 15.4.1-15.4.5.
National Telecommunications Conference, Houston, Tex., Dec. 1980, vol. 1 of 4, pp. 22.1.1-22.1.6.
International Symposium on Subscriber Loops and Services, Munich, Sep. 1980, vol. 73, pp. 217-223.

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