EXFO FTB-1, User Manual

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Test Results
NetBlazer
369
Performance Monitoring

SEP (Severely Errored Period) ( G.828 only): A sequence between
3 to 9 consecutive SES. The sequence is terminated by a second which
is not a SES.

SEPI
(Severely Errored Period Intensity) (
G.828
only): Gives the count
of SEP events in available time, divided by the total available time in
seconds.
Far-End

EFS
(Error Free Second): Gives the count of the seconds within which
no error occurred or when a defect is detected on the near-end.

EC
(Error Count) (
G.821
only): Gives the number of bit errors.

EB (Errored Block) ( G.826 , G.828 , and G.829 ): Gives the count of
blocks in which one or more bits are in error.

ES (Errored Second): For G.826 , G.828 , G.829 , M.2100 ISM , and
M.2101
: Gives the count of the seconds within which one or more
anomalies (FAS (DSn/PDH), EB, etc.) occurred or at least one defect
occurred.

SES (Severely Errored Second)
For G.826
,
G.828
,
G.829
and
M.2101
: Gives the number of seconds
within which anomalies (FAS (DSn/PDH), EB, etc.) are  X percent or
at least one defect occurred. X=30 percent for DSn/PDH signals; see
the following table for SONET/SDH signals SES threshold.
OC-1
STS-1e
STM-0
STM-0e
OC-3
STS-3e
STM-1
STM-1e
OC-12
STM-4
OC-48
STM-16
OC-192
STM-64
Path 30% 30% 30% 30% 30%
Line/MS 15% 15% 25% 30% 30%
Section/RS 10% 30% 30% 30% 30%