Key telephone system

Details Key telephone system Key telephone system

1987-10-02

1989-04-11

George, Keith E.

Telephonic communications

Multi-line or key substation system with selective switching...

379165, 379201, H04M 100, H04Q 520

Patent

active

048213160

ABSTRACT:
A key telephone system includes a temporary registration memory for temporarily storing operating data and a final registration timing data memory for storing final registration timing data, including a timing condition for transferring contents of the temporary registration memory to the operating data memory. Operating data input by a user and the final registration timing data are written into the temporary registration memory and the final registration timing data memory, respectively, from a data input unit connected to the main unit during a data setting mode. The system discriminates establishment of the timing condition designated in accordance with the final registration timing data stored in the final registration timing data memory, whereupon the operating data stored in the temporary registration memory is transferred to the operating data memory.

REFERENCES:
patent: 4491693 (1985-01-01), Sano et al.
patent: 4559417 (1985-12-01), Komuro et al.
patent: 4595800 (1986-06-01), Nagatomi et al.
Japanese Patent Laid-Open No. Sho 60-7294 Int. Cl. H04Q 3/58, H04M 1/72 (in Japanese).

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