Apparatus and method for interfacing between a communications ch

Details Apparatus and method for interfacing between a communications ch Apparatus and method for interfacing between a communications ch

1996-02-28

1998-09-01

Woo, Stella

Telephonic communications

Telephone line or system combined with diverse electrical...

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

379 93, 375222, H04M 1100

Patent

active

058021531

ABSTRACT:
An apparatus (101) and method for interfacing between a processor (103) and a communications channel (105), the processor operable in data terminal equipment (102) such as a computer having a communications application program, to provide for data transmission and reception over a communications channel (105), utilizing the computer processor without additional or redundant microprocessor or digital signal processor components. The apparatus and method provide for data transfer between the interface apparatus (101 ) and the communications channel (105) at a first, determinate frequency corresponding to a specific data transmission rate. The apparatus and method provide for data transfer between the interface apparatus (101) and the processor (103) at a second, indeterminate frequency, and provides for interim data storage in memory (115) between data transmission (or data reception) and data processing, such as modulation and demodulation, by the computer processor (103). The apparatus and method further provide for generating an interrupt signal to the processor to indicate the presence of received data for processing and the absence of digital data for transmission.

REFERENCES:
patent: 4965641 (1990-10-01), Blackwell et al.
patent: 5170470 (1992-12-01), Pindar et al.
patent: 5367534 (1994-11-01), Chou et al.

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