Nortel Networks 1000 - Manual (Page 241)

Man-Machine T1 maintenance interface software 241
LTI T1 Interface History Performance Log
3/03/95 1:35
Hour Errored Bursty Unavailable Loss Frame Error
Frame Slip
Ending Seconds Seconds Seconds Seconds Seconds Counter
20:00 139 0 129 139 23 162
19.00 0 0 0 0 0 0
18.00 0 0 0 0 0 0
17.00 0 0 0 0 0 0
16.00 0 0 0 0 0 0
Use the pause command to display a full screen at a time by entering D
H P.
Clear Error
Reset the error counter to zero by entering the Clear Error (C E) command
set. The error counter provides a convenient way to determine if the T1
link is performing without errors since it can be cleared and examined at
any time.
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
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.