Metrodata ATM CBR DSU, Руководство пользователя

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ANALYSING PERFORMANCE
55 76-02-031E
6 . 4. 4 Summary style
This option determines the method of presenting the error information in the summaries.
These options are not available for the Full or Rolling reports, which have a fixed style.
The SUMMARY STYLE option only shows on the menu when a SUMMARY has been
selected in the DISPLAY MODE . The styles available are:
Figure 6.8 Summary styles
The G.821 and%G.821 parameter definitions for Performance reporting are given below:
Figure 6.9 G.821 Error definitions
The screen examples that follow show typical summary displays in each style for the
Physical layer. The PLCP and ATM layer statistics are given in separate later subsections.
COUNTS Errors and alarms accumulate and are quoted as an absolute count.
G.821 Errors and alarms are expressed as G.821 parameters per second.
%G.821 Errors and alarms are shown in terms of normalised percentage G.821
parameters.
G.821 Item Meaning
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 minute 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 sec-
onds
DM Degraded minutes: >1 in 10
6
errors/minute