Telephonic communications – Centralized switching system – Switching controlled in response to called station...
Patent
1992-04-30
1994-10-04
Dwyer, James L.
Telephonic communications
Centralized switching system
Switching controlled in response to called station...
379207, 379201, H04M 342
Patent
active
053533437
ABSTRACT:
A telephonic switching system (11) with a switch (10) controlled by a central processing unit (12) to interconnect interior communication units (14) and exterior telephonic units (16) in accordance with data in a shared data memory (18) with data that is alterable in response to signals generated by the communication units. A data memory access system (23) periodically shifts access to the data memory (18) from one special process to another successive special process in a process memory (20). The data memory access system (23) prevents the normal periodic shifting of access to the data memory (18) during a period when the special process with access is enabled to access and alter shared data.
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Dwyer James L.
Hamann H. F.
Hunter D. S.
Patti C. B.
Rockwell International Corporation
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