Nortel Networks 553-3001-211 manual Display Performance D P screen

NT5D33 and NT5D34 Lineside E1 Interface cards Page 293 of 894

•Loss-of-frame seconds are seconds in which loss-of-frame or loss-of-signal conditions have existed for three consecutive seconds.

•Frame slip seconds are seconds in which one or more frame slips occur.

The MMI also maintains an overall error counter which is the sum of all errors counted for the performance criteria listed above. The error counter can only be cleared by entering the Clear Error (C E) command. It stops counting at 65,000. The error counter provides an easy method to determine if an alarm condition has been corrected. Clear the error counter, wait a few minutes, and display the performance to see if any errors have occurred since the counter was cleared.

The MMI display reports on these performance counters through the Display Performance (D P) or the Display History (D H) commands.

Display Performance

Entering the Display Performance (D P) command displays performance counters for the past hour. A screen similar to Figure 52 will appear.

Figure 52

Display Performance (D P) screen

		LEI E1 Interface Performance Log
			3/03/95 1:37 PM
Data for the past 37 Minutes
Errored	Bursty	Unavailable	Loss Frame	Frame Slip	Error
Seconds	Seconds	Seconds	Seconds	Seconds	Counter
2263	0	2263	2263	352	321

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. Just before the performance counters are reset to zero, the values are put into the history log.

The error counter indicates the number of errors since the error counter was cleared.

Circuit Card Description and Installation