Apparatus for communicating data via a telephone

Details Apparatus for communicating data via a telephone Apparatus for communicating data via a telephone

1990-05-30

1992-02-04

Dwyer, James L.

Telephonic communications

Telephone line or system combined with diverse electrical...

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

379 98, 379100, H04

Patent

active

050864530

ABSTRACT:
A data communication apparatus includes a data communication portion adapted to be connected to the public telephone line in parallel to a telephone set for data transmission/reception with another station through line connection, a termination command generating device for generating a termination command to terminate data communication by the data communication portion under predetermined conditions, a detecting device for detecting a termination command and generating a detection signal, a delay circuit for delaying the detection signal by a predetermined time, and a line connection terminating device responsive to the delayed detection signal for terminating line connection. There is a predetermined time margin defined by the delay circuit, during the time the termination command is generated until the line connection is terminated. Accordingly, the operation to maintain line connection after the termination of data communication can be performed easily, and talking with the destination station by the telephone is available without re-establishing the line connection, for example.

REFERENCES:
patent: 4794637 (1988-12-01), Hashimoto
patent: 4901343 (1990-02-01), Yamaguchi
patent: 4974253 (1990-11-01), Hashimoto

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