Modularly structured digital communications system
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United States of America Patent
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-
Feb 20, 1990
Grant Date -
N/A
app pub date -
Aug 19, 1988
filing date -
Aug 21, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Modularly Structured Digital Communications system. The multi-tasking operating system of a central system processor control administers a line technology task having device program modules associated with types of terminal equipment and administers a switching technology task having switching procedure program modules independent of the class of terminal equipment and independent of communications service. The line technology task and the switching technology task each have input and output memories operated mailbox like allocated to them. For exchange of messages between the tasks, the multi-tasking operating system have a program bus structure with a transmission protocol defined with universal validity independently of communications service and independently of type of terminal equipment.
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