Key telephone system

Details Key telephone system Key telephone system

1985-04-03

1987-03-17

Rubinson, Gene Z.

Telephonic communications

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

Line status indication or call alerting

379165, H04M 1274

Patent

active

046509321

ABSTRACT:
In a key telephone system, when it is impossible to set at a time the entire operation data stored in a memory device of a key station unit by using a key of a specific key telephone set among a plurality of key telephone sets connected to the key station unit, the entire data of respective operation items are divided into a plurality of data sets and then the setting of the data of respective data sets are independently set. The division of the data of respective operation items is made corresponding to the output state of a hook switch, for example.

REFERENCES:
patent: 4196316 (1980-04-01), McEowen et al.
patent: 4203011 (1980-05-01), Coriello
patent: 4291199 (1981-09-01), Densmore
patent: 4453040 (1984-06-01), Wolf et al.
patent: 4491693 (1985-01-01), Sano et al.
patent: 4517409 (1985-05-01), Nagasaki

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