Cabletron Systems MMAC-Plus SFCS-1000, Configuration Manual

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4-9
SONET Configuration
sonetPathYellows The number of seconds in which path yellow
alarm has occurred. A path yellow alarm is
detected by extracting bit 5 of the path status
byte. If bit 5 is high for ten consecutive frames, a
yellow alarm is declared. A yellow alarm is
cleared when bit 5 is low for ten consecutive
frames. Yellow signals are used to alert upstream
terminals of a downstream failure in order to ini-
tiate trunk conditioning on the failure circuit.
sonetAtmCorrectable-
HCSs
The number of correctable Header Check
Sequence (HCS) error events that occurred since
the port was reset. The HCS is a CRC-8 calcula-
tion over the first 4 octets of the ATM cell header.
sonetAtmUncorrect-
ableHCSs
The number of uncorrectable Header Check
Sequence (HCS) error events that occurred since
the port was reset. The HCS is a CRC-8 calcula-
tion over the first 4 octets of the ATM cell header.