Metrodata ATM CBR DSU, Руководство пользователя

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ANALYSING PERFORMANCE
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PLCP (Physical Layer Convergence Protocol) statistics are displayed when the PLCP
STATS option is selected from the PERFORMANCE DATA menu. PLCP display parameter
definitions are:
Figure 6.15PLCP statistics definitions
An example summary screen is shown below.
Display Definition
Alarm Counts Summary Style Counts
Total seconds Elapsed time of current interval
LOF Number of PLCP loss of frame events
YEL Number of PLCP remote alarm events (known
at the physical layer as RAI)
PLCP BIP, FEBE &
Frame Errors
Summary Style Counts
Total seconds Elapsed time of current interval
Error count Number of PLCP loss of frame or BIP error events
Error rate Line Error rate
PLCP BIP, FEBE &
Frame Errors
Summary Style G.821
Total seconds Elapsed time of current interval
ES Errored seconds
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 con-
secutive seconds
DM Degraded minutes: > 1 in 10
6
errors/minute