Telephonic switching system with a user controlled data...

Details Telephonic switching system with a user controlled data... Telephonic switching system with a user controlled data...

H - Electricity

04

L

H04L 12/50 (2006.01) G06F 9/46 (2006.01) H04M 3/42 (2006.01) H04Q 3/545 (2006.01)

Patent

CA 2095191

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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