VeEX MPA User Manual page 366

MPA_e_manual_D07-00-129P_RevA00
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UAS - Unavailable Seconds. Reports the number of seconds that the Path layer
was considered unavailable. A Path is considered unavailable when at least 10
consecutive Severely Errored Seconds occur.
Perf Monitor - BIT
(Specifically for SONET testing)
Bit analysis provides a detailed breakdown for detected Payload Bit errors.
The following statistics are reported:
Payload - BIT Errors
•
CV - Coding Violations. Reports an error count of incoming BIT errors.
•
ES - Errored Seconds. Reports the duration of the incoming BIT errors in
seconds and the percentage of errored seconds compared to the duration of
error free seconds.
•
EFS - Error Free Seconds. Reports the duration of the incoming BIT error free
seconds and the percentage of error free seconds compared to the duration of
errored seconds.
•
SES - Severely Errored Seconds. Reports the duration of SES on the incoming
SONET signal. An SES is reported when the number of BIT errors per second
equals or exceeds 2,400 errors per second for STS mappings or 600 errors
per second for VT mappings, or when an LOS alarm, SEF alarm, LOF alarm,
AIS-L alarm, LOP-P alarm, AIS-P alarm, UNEQ-P alarm, UNEQ-V alarm, AIS-V
alarm, LOP-V alarm, or LOM-V alarm is present.
•
UAS - Unavailable Seconds. Reports the number of seconds that the Payload
was considered unavailable. The Payload is considered unavailable when at
least 10 consecutive Severely Errored Seconds occur.
SONET Tab
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