Data communication apparatus and method for performing noiseless

Details Data communication apparatus and method for performing noiseless Data communication apparatus and method for performing noiseless

1995-06-01

1997-08-12

Woo, Stella

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

348 17, 37910017, 379 9308, H04M 1100

Patent

active

056573790

ABSTRACT:
A data communication system by which simultaneous communication of voice and data is possible without disturbing voice communication. During communication between a first telephone and a second telephone through a telephone line, when a data signal from a computer is fed to a data communication system, the data signal is modulated according to a spread spectrum system by a spread spectrum modem, mixed with the voice signal, and transmitted from a line interface to the telephone line. The signal including the spread spectrum modulated data signal and the voice signal is received in the second telephone. The voice mixed with spread spectrum modulated data signal is heard at the second telephone with only slight noise. Thus, talking can continue undisturbed, because energy of the data signal is spread to a wider band.

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