Key telephone system for subscribers

Details Key telephone system for subscribers Key telephone system for subscribers

1975-09-30

1976-10-12

Stellar, George G.

179 18AD, 179 99, H04M 1106, H04M 100

Patent

active

039859592

ABSTRACT:
A key telephone system for subscribers is disclosed which includes at least a plurality of key telephone stations, a subscriber common equipment which connects the key telephone stations to each other and further connects the key telephone stations and an private automatic branch exchange, wherein said subscriber common equipment comprises switching network circuits, a register connecting circuit, line circuits, intra-office circuits, line circuit links, intra-office circuit links and a common controller, whereby each of said key telephone stations is connected to the subscriber common equipment through a pair of speech lines and a few control lines, and further said key telephone station can handle data processing services through said control lines by using a data terminal equipment attached to the key telephone station and a data processing unit by way of said subscriber common equipment.

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