Method and apparatus for quality monitoring of at least two tran

Details Method and apparatus for quality monitoring of at least two tran Method and apparatus for quality monitoring of at least two tran

1990-03-22

1992-09-29

Smith, Jerry

Excavating

371 201, G06F 1100

Patent

active

051519020

ABSTRACT:
Method for quality monitoring of at least two series connected transmission sections in a digital signal transmission link for digital equipment conforming to the synchronous digital hierarchy. Error message bytes in which parity errors are accumulated are transmitted in the section overhead of synchronous transport modules as special bytes for the accumulation of parity errors in successive transmission sections. A quality criterion for the monitored transmission link is acquired from a sequence of error message bytes. The method and the apparatus are advantageously used in transmission equipment of digital synchronous hierarchy.

REFERENCES:
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patent: 3562710 (1971-02-01), Halleck
patent: 3665394 (1972-05-01), Lender et al.
patent: 3916379 (1975-10-01), Dulaney et al.
patent: 4321666 (1982-03-01), Tasar et al.
patent: 4342083 (1982-07-01), Freedman et al.
patent: 4356546 (1982-10-01), Whiteside et al.
patent: 4551842 (1985-11-01), Segarra
CCITT-recommendations G707-G709, 1988.
Telcom report, special. vol. 10, Dec. 1987, Multiplexing Line Transmission, pp. 107-112.

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