Parity checking arrangement

Details Parity checking arrangement Parity checking arrangement

1982-12-06

1985-10-08

Smith, Jerry

Excavating

G06F 1110

Patent

active

045464758

ABSTRACT:
In a stored program controlled electronic telephone switching system transmission links are provided from a host office, provided with a central processor, to one or more remote offices, each provided with a remote processor. Data and control information are continually passed between the host office and each remote office in a digital time-division format. Data integrity is monitored through a cyclic odd and even patterned parity scheme which predetermines the parity of sequential time slots in one direction of transmission and reflects that parity pattern in the return direction of transmission between host office and remote offices. The patterned parity scheme detects hardware faults in the interface for the transmission links between host and remote offices on a continuous basis.

REFERENCES:
patent: 4224681 (1980-09-01), Levine
patent: 4280217 (1981-07-01), Hafer et al.
patent: 4296492 (1981-10-01), Hafer
patent: 4346474 (1982-08-01), Sze
patent: 4429391 (1984-01-01), Lee

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