Pulse or digital communications – Transceivers – Modems
Patent
1994-06-30
1999-06-29
Pham, Chi H.
Pulse or digital communications
Transceivers
Modems
375377, 379 9329, 379 9309, H04B 138, H04L 516
Patent
active
059178531
ABSTRACT:
A method and apparatus for "training" high speed telephonic modems to adjust or become corrected to obviate imperfections in the telephone channel or line, such as echoes, phase changes and other effects, while concurrently with voice communication on such simple telephone lines through sending test signals in unoccupied spaces of successive time frames created by compressing concurrent digital voice therein.
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Academy of Applied Science
Pham Chi H.
Webster Bryan
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