here are the pages from the docs
CSU stats
Each DTI is equipped with an internal channel service unit
(CSU). When enabled, the internal CSU monitors the quality
of the received T1 signal and provides performance statistics
and diagnostic information.
DTIs must be individually programmed to establish
parameters for collecting and measuring transmission
performance statistics by the CSU.
Statistics Installer password required
The CSU provides both performance and alarm statistics.
Three performance parameters are accumulated:
• errored seconds (ES-P)
• severely errored seconds (SES-P)
• unavailable seconds (UAS-P)
These parameters are defined as per TIA-547A. Errored
seconds are enhanced to include control slip (CS) events.
The parameters are stored for the previous 15-minute interval,
the 15-minute intervals in the last 24 hours, and the previous
24-hour interval. Only near-end performance data is recorded.
The internal CSU continuously monitors the received signal
and detects four types of transmission defects:
• any active carrier failure alarms (CFA) — loss of signal
LOS, out of frame OOF, alarm indication signal AIS,
remote alarm indication RAI
• the number of bipolar violations that occurred in the last
minute
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• any defects that occurred in the last minute — loss of
signal LOS, out of frame OOF, alarm indication signal AIS
• the number of milliseconds of short term alarms in the last
minute — loss of signal LOS, out of frame OOF, alarm
indication signal AIS, remote alarm indication RAI.
A shortterm alarm is declared when the detected defects
persist for tens of milliseconds.
A carrier failure alarm (CFA) is a duration of carrier system
outage. CFA types reported can be mapped to CFAs defined in
TIA-547A and TR62411 as follows:
The criteria for declaring and clearing the alarms is selectable
to meet those in TIA-547A or TR64211.
Checking the performance statistics
To check the performance statistics, start with the display
showing CSU stats:
1. Press ?. Show card: displays.
If the ICS in not equipped with DTIs, or if both cartridges
have their internal CSU setting programmed to off, the
display shows Unequipped.
2. Press ? or ¤ depending on which Trunk Cartridge you
are checking. Cd1-KSU or Cd2-KSU: displays.
3. Press ? to see the results.
Norstar TIA-547A TR62411
LOS CFA Red CFA Red CFA
OOF CFA Red CFA Red CFA
AIS CFA Red CFA AIS CFA
RAI CFA Yellow CFA Yellow CFA
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4. Press TIMER. The display shows the date and time that the
system began collecting statistics.
5. Press ‘. Performnce stats displays.
6. Press ? to view the performance stats.
Current interval displays.
7. Press ? to display the duration of the current
interval.
OR
Press ‘ until the display shows the type of
interval statistics you want to check. Options are:
• 15 min intervals for intervals in the last 24 hours,
numbered from the most recent (01) to the oldest (96).
Press ?, then enter an interval number,
or press ‘ to view the most recent interval.
The display shows the start time of the interval.
• 24 hour summary for a summary of the previous 24
hours. Press ? to display the number of
intervals in the summary.
8. Press ‘. ES: displays the number of errored
seconds.
9. Press ‘. SES: displays the number of severely
errored seconds.
10. Press ‘. UAS: displays the number of unavailable
time seconds.
11. Press – until the display shows Performnce
stats.
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Checking the CSU alarms Installer password required
To check the CSU alarms, start with Performnce stats.
1. Press ‘. Alarm stats displays.
2. Press ?. Active alarms displays.
Checking active alarms
Start with the display showing Active alarms.
1. Press ?. The display shows the first active alarm
or no active alarms.
2. Press ‘ or “ to cycle through the
complete list of active alarms.
3. Press – to return to Active alarms.
Checking carrier failure alarms
Start with the display showing Active alarms.
1. Press ‘. CFA alarms displays.
2. Press ?.
The display shows one of the following:
LOS CFA history, OOF CFA history, RAI CFA history or
AIS CFA history.
3. Press ‘ until the display shows the type of alarms
you wish to view.
4. Press ?. The display shows the first history item
and the time that the alarm started.
5. Use ‘ and “ to move through the
history items.
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Checking bipolar violations
Start with Active alarms.
1. Press ‘ until you find Bipolar violatn.
2. Press ?. The display shows the number of
bipolar violations that occurred in the last minute.
Checking short term alarms
Start with Active alarms.
1. Press ‘ until you find ShortTerm alarms.
2. Press ?.
The display shows the first type of shortterm alarm and the
number of milliseconds, not necessarily contiguous, it was
active in the last minute.
3. Press ‘ and “ to move through the
short term alarms.
Checking defects
Start with Active alarms.
1. Press ‘ until you find Defects.
2. Press ?.
The display shows the first type of defect and the number
of milliseconds, not necessarily contiguous, the hardware
reported it active in the last minute.
3. Press ‘ and “ to move through the
defects.
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