Metrodata FM4900, Руководство пользователя

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ANALYSING PERFORMANCE
39 76-02-011F
7 . 2. 5 Error and Alarm definitions
The definitions corresponding to Performance reporting are given below:
Figure 7. 5 Performance data definitions
Errors Definition
LCV Code Indicate bipolar violations leading to HDB3 code errors.
FAS Frame Alignment Signal which indicates a fault in the frame alignment
pattern. This measurement is only valid in G.751 framed mode.
G.821 Errors Definition
Err. Count The number of errors in the interval.
Total secs Valid number of seconds in the interval (less than 900 means that the
15- min. period was incomplete).
EFS Error-free seconds.
ES Errored seconds: seconds with an error.
BES Bursty errored seconds: seconds > 2 errors,<1 in 10
3
errors
SES Severely errored seconds: seconds >1 in 10
3
errors.
UAS Unavailable seconds: declared after SES for 10 consecutive seconds.
DM Degraded minutes: >1 in 10
6
errors/minute.
Alarms Definition
LOS Loss Of Signal: No data and therefore no clocking information. The units
are alarm seconds if the summary style is G.821, or events if the style is
set to counts.
LOF Loss of Frame: Clocking information is there but the frame alignment
pattern is faulty. The units are alarm seconds if the summary style is
G.821, or events if the style is set to counts.
AIS Alarm Indication Signal: All '1s' being received. The units are alarm sec-
onds if the summary style is G.821, or events if the style is set to counts.
RAI Remote Alarm Indication: the Remote FM4900 has detected a problem.
The units are seconds if the summary style is G.821, or events if the
style is set to counts.
SQ Signal Quality : >1 in 10
3
FAS errors. The units are alarm seconds if the
summary style is G.821, or events if the style is set to counts.