Data distribution system for private automatic branch exchange
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 25, 1981
Grant Date -
N/A
app pub date -
Jul 2, 1979
filing date -
Jul 2, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A data distribution system for a private branch telephone exchange for providing information to a plurality of PBX stations. Two embodiments (serial and parallel) including addressable stations are shown. Memory devices driving a plurality of displays at each station are updated in response to command signals from a controller preceded by the station address. Each station may communicate with the controller and transmit keyed-in signals or information reflecting station availability. A novel multiplexed LCD, switching matrix bypass upon controller failure circuit, and bus protection circuit upon remote power supply failure are also shown.
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