RAD Data comm IPmux-1 - Manual (Page 129)

IPmux-1/1E Installation and Operation Manual Appendix E Parameters and Screens
Performance Monitoring E-31
Table E-21. E1/T1 Statistics (Cont.)
Alarm Failure Comments
DM Degraded
Minutes
A Degraded Minute is calculated by collecting all of the available seconds,
subtracting any SESs and sorting the result in 60 second groups.
A Degraded Minute is a 60 second group in which the cumulative errors
during the 60-second interval exceed 1x10-6.
T1-ESF or E1-CRC4 modes
ES Errored
Second (If any
error occurs
during one
second)
For E1/T1: Any second containing the following error events:
• CRC
• SEF (OOF)
• AIS (T1 only).
If SES is also active (see below) ES runs for 10 seconds and then stops.
SES Severely
Errored
Seconds
Any second containing the following errored events is counted as severely
errored seconds:
For E1/T1:
• If 320 or more CRC error events
• One or more SEF (OOF) events
• One or more AIS events occurred (for T1 only).
UAS Unavailable
Seconds
Activated when there are 10 consecutive SES occurrences and
Deactivated as a result of 10 consecutive seconds without SES.
LOMF Loss of
Framing
Loss Of Framing sequence in Timeslot 16.
E1 CAS mode only
The following parameters can be monitored from the Link Status menu:
Valid Intervals – number of 15-minute intervals stored in the system since
power- up.
Time Since – elapsed time since the beginning of the current interval (interval 0).
This is displayed only when the current interval is monitored.
Interval Number – number of the interval to be displayed.
Interval number 0 (zero) is the current interval.
The current interval display is continuously updated.
The elapsed time since the beginning of the interval is displayed.
Start Time – time and date when the monitored interval started. This is displayed
only when viewing previous intervals.
Prev – displays the previous interval. From the first interval (current interval = 0)
Prev is not visible.
Next – displays the next interval.
The number of valid intervals is displayed.
From the last valid interval Next is not visible.
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