Exchange having a display apparatus for displaying calls termina

Details Exchange having a display apparatus for displaying calls termina Exchange having a display apparatus for displaying calls termina

1991-02-22

1992-05-26

Schreyer, Stafford D.

Telephonic communications

Centralized switching system

Switching controlled in response to called station...

379267, 379376, 379396, 379263, 379164, H04M 504, H04M 508

Patent

active

051174545

ABSTRACT:
An exchange having a display apparatus for displaying the states of a plurality of subscriber terminals accommodated therein. The display apparatus includes a display board having n indicator-keys, each for displaying the state of a subscriber terminal and an indication board having m indicator-keys, each for selectively indicating the states of n groups of subscriber terminals so that the states of a total of n.times.m subscriber terminals are displayed. Under control of the exchange, the display apparatus displays an incoming call and a recall terminated at an attendant console by lighting up the indicator-keys and flickering the indicator keys on and off, respectively. When an indicator-key which is displaying an incoming call or a recall is pressed, the subscriber terminal and the station line concerned are connected.

REFERENCES:
patent: 4280022 (1981-07-01), Sekiguchi et al.

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