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Page 240 of 906 NT5D11 and NT5D14 Lineside T1 Interface cards
553-3001-211 Standard 3.00 August 2005
• Loss of frame seconds – loss of frame or loss of signal for three
consecutive seconds.
• Framer slip seconds – one ore more frame slips in a second.
The MMI also maintains an overall error counter that is a sum of all the errors
counted for the five performance criteria listed above. The error counter can
only be cleared by entering the “Clear Error” command. It will stop counting
at 65,000. The error counter provides an easy method to determine if an alarm
condition has been corrected. Simply clear the error counter, wait a few
minutes, and display performance to see if any errors have occurred since the
counter was cleared.
Display the reports on these performance counters by entering the Display
Performance (D P) or the Display History (D H) command sets into the MMI.
Display Performance
Enter the Display Performance (D P) command set to display performance
counters for the past hour. A screen similar to the following will appear:
Each column, except the error counter, indicates the number of errors in the
current hour and is reset to zero every hour on the hour. When these counters
are reset to zero, the performance counter values are put into the history log.
The error counter indicates the number of errors that occurred since the error
counter was cleared.
LTI T1 Interface Performance Log
3/03/95 1:37
Data for the past 37 Minutes
Errored Bursty Unavaila
ble Loss
Frame Frame
Slip Error
Seconds Seconds Seconds Seconds Seconds Counter
2263 0 2263 2263 352 321