Host computer digital signal processing system for communicating

Details Host computer digital signal processing system for communicating Host computer digital signal processing system for communicating

1997-10-10

1999-02-16

Kuntz, Curtis A.

Telephonic communications

Telephone line or system combined with diverse electrical...

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

379 9326, 379 9328, 379 9317, 370290, 370354, 375222, 375232, H04M 1100

Patent

active

058728368

ABSTRACT:
A conventional computer is coupled to an analog telephone transmission link by means of an analog/digital conversion interface adapter. Modem transmission is accomplished by performing the modulation and demodulation functions digitally in the computer's existing processor which executes programs which transfer data between the computer's memory and the interface adapter. Using the same interface adapter and existing processor, the arrangement may be used to send and receive images in the form of standard V.29 format facsimile data, to send and receive data operating as a synchronous IBM 3270 compatible terminal device, or to record and play back conventional voice transmissions rather than data to implement a telephone answering, voice message handling, and telemarketing systems.

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CCITT Recommendation T.4 on "Standardization of Group 3 Facismile Apparatus for Document Transmission.".
The Theory and Practice Modem Design, by John A.C. Bingham, pp. 166-167, 226-231, and 282-286 (1988).
"Microcomputer RTTY . . . a Software TU--use your 8080 and very little else," 73 Magazine for Radio Amateurs, pp. 78-82 (Jul. 1979).

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