Data communication apparatus

Details Data communication apparatus Data communication apparatus

1991-04-23

1993-02-23

Dwyer, James L.

Telephonic communications

Supervisory or control line signaling

Substation originated

379356, 379354, 379200, 379188, H04M 1100, H04M 166

Patent

active

051896966

ABSTRACT:
Data communication apparatus which dials based on the preregistered telephone numbers, prohibits or allow data communication based on the telephone number data the apparatus includes a memory to memorize the data for judging if data communication is allowed for a telephone number an a control to control dialing based on the result of such judgment.

REFERENCES:
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patent: 4764951 (1988-08-01), Kotani et al.
patent: 4802202 (1989-01-01), Takashi et al.
patent: 4833707 (1989-05-01), Serret, Jr.
patent: 4894861 (1990-01-01), Fujioka
patent: 4920560 (1990-04-01), Kageyama
Patent Abstract of Japan, vol. 13, No. 264, (E-774) (3612), Jun. 19, 1989.
Patent Abstracts of Japan, vol. 12, No. 389, (E-669) (3236), Oct. 17, 1988.
Patent Abstracts of Japan, vol. 13, No. 304, (E-786) (3652), Jul. 12, 1989.

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