Avaya 1000 Series, Reference

Page: 186 / 700

Port 12 off hook, Port 13 on hook, Port 14 on hook,
Port 15 on hook,
Port 16 on hook, Port 17 on hook, Port 18 off hook,
Port 19 off hook,
Port 20 off hook, Port 21 on hook, Port 22 on hook,
Port 23 on hook
Performance counters and reporting
The MMI monitors the performance of the T1 link according to several performance criteria
including errored, bursty, unavailable, loss of frame and frame slip seconds. It registers the
performance of these criteria by reading their status every second and counting their results.
These counts are accumulated for an hour, and then they are reset to 0. Previous hour count
results are maintained for each hour for the previous 24 hours.
Performance counts are maintained for the following:
• Errored seconds – one or more CRC-6 errors, or one or more out of frame errors in a
second.
• Bursty seconds – more than one and less than 320 CRC-6 errors in a second.
• Unavailable seconds – unavailable state starts with 10 consecutive severely errored
seconds and ends with 10 consecutive severely errored seconds (excluding the final 10
non-severely errored seconds). Severely errored seconds are defined as more than 320
CRC-6 errors, or one or more out of frames in a second.
• 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 stops counting at 65,000. The error counter provides an easy method
to determine if an alarm condition is corrected. Simply clear the error counter, wait a few
minutes, and display performance to see if any errors occurred because 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 appears:
LTI T1 Interface Performance Log
3/03/95 1:37
Data for the past 37 Minutes
Errored Bursty Unavailable Loss Frame Error
ble Frame Slip
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. When these counters are reset to zero, the performance
NT5D11 and NT5D14 Lineside T1 Interface cards
186 Circuit Card Reference July 2011
Comments? infodev@avaya.com