Program update in duplicated switching systems

Details Program update in duplicated switching systems Program update in duplicated switching systems

1985-12-20

1988-07-05

Smith, Jerry

Excavating

371 19, 371 25, 379279, H04M 324, G06F 1116

Patent

active

047559950

ABSTRACT:
A time-division switching system including first and second control units operating in accordance with a generic program is disclosed. After a new generic program is stored in the second control unit, the first control unit still operating in response to the old generic program initiates the performance of a test sequence by the second control unit. The first control unit times the execution of the test sequence. When the test sequence is not completed within a predetermined period of time or when test results generated by the test sequence do not match expected test results, a failure message is generated. Alternatively, when the test sequence is completed within the predetermined period of time and test results match the expected test results, a success message is generated.

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H. J. Beuscher et al., "Administration and Maintenance Plan", The Bell System Technical Journal, Oct. 1969, vol. 48, No. 8, pp. 2765-2815.
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T. E. Browne et al. "Control Unit System", The Bell System Technical Journal, vol. 48, Oct. 1969, No. 8, pp. 2619-2668.

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