Apparatus for control of storing information into dial memories

Details Apparatus for control of storing information into dial memories Apparatus for control of storing information into dial memories

1992-10-20

1993-09-21

Dwyer, James L.

Telephonic communications

Supervisory or control line signaling

Substation originated

379359, 379354, 379200, H04M 1100

Patent

active

052475727

ABSTRACT:
A control signal generator is provided to supply a control signal to a control unit of a telephone set having dial memories. Information stored in a memory in the dial memories is forbidden to be erased, unless the control signal is supplied to the control unit. As a result, important information is protected from erroneous erasing in the dial memory.

REFERENCES:
patent: 4243845 (1981-01-01), Feinberg et al.
patent: 4674111 (1987-06-01), Monet et al.
patent: 4677653 (1987-06-01), Weiner et al.
patent: 4723265 (1988-02-01), Kamei et al.
patent: 4961212 (1990-10-01), Marui et al.
patent: 4994926 (1991-02-01), Gordon et al.
European Search Report, Jun. 25, 1992, Examiner, De Haan A. J.

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