Nortel NT1R20, Description

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NT5D11 Line-side T1 Interface Card Page 121 of 290
Line cards Description
Display Status
The Display Status (D S) command set displays the current alarm condition
of the T1 link as well as the on-hook or off-hook status of each of the 24 ports
of the line-side T1 card. Entering the Display Status (D S) command set will
cause a screen similar to the following to appear:
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, at which time they are reset to 0. Previous hour
count results are maintained for each hours for the previous 24 hours.
The performance criteria for which these counts are maintained are as
follows:
— 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
LTI S/N Software Version 1.01 3/03/95 1:50
In alarm state: NO
T1 link at alarm level 0
Port 0 off hook, Port 1 on hook, Port 2 on hook, Port 3 on hook,
Port 4 on hook, Port 5 on hook, Port 6 off hook, Port 7 off hook,
Port 8 off hook, Port 9 on hook, Port 10 on hook, Port 11 on hook,
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