Academy of Applied Science

Other

Richard David Greenblatt

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.

Method of and apparatus for training high speed digital telephonic

A method of and apparatus for providing compatible universal identification telephone protocols by generating predetermined unique audio sequences recognizable by the telephone user as defining standardized Audio Icon information and distinct from and separated from one another and other telephonically transmitted signals; sending and receiving such generated audio sequences on a public switched telephone network having paths the parameters of which fall within predetermined specified training sets, including modem performance standards; and assuring recognition and correct identification of such audio sequences conveyed along such paths.

Method of and apparatus for exchanging compatible universal

A method and apparatus for telephone line multiplex channeling of toll-quality voice and modem-encoded digital data from telecommunication devices (FAX, computers, displays, printers, etc.) involving variably sample-compression of digitally converted voice signals within successive time frames, and filling the resulting unoccupied time within each such frame with the modem-encoded digital data, and preferably with guard band signals separating the voice and modem-encoded digital data within each frame.

Method and apparatus for telephone line multiplex channeling of

A novel method of and apparatus for voice communication and transparent, non-interfering, automatic digital data exchange between appropriately equipped telephone terminals having cooperative digital signal processing and visual display equipment, using special recognition signal protocol triggering signals and providing modem capability for FAX, printer, microprocessor, answer machines and the like for providing extended services using in-band signalling sensible by users and machines. Such method is useful both with ordinary telephone exchanges and ISDN type exchanges.

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Belmont, MA, United States of America

Richard David Greenblatt