Nortel Modular Ics 6.0 Installer Guide

Tests / 531
P0992638 03Modular ICS 6. 0 Installer Guide
Operating a Continuity loopback testInstaller password required
You start the Continuity loopback test by pressing the button 
on the front of the DTI. Calls on all lines on the cartridge are 
automatically dropped when a loopback test is invoked. 
The red LED above the button remains on until the test is 
canceled.
Invoking a Continuity loopback test automatically cancels 
any other test in progress.
To stop the continuity loopback test, press...

532 / Tests
Modular ICS 6.0 Installer GuideP0992638 03
Operating a payload loopback testInstaller password required
Start with the display showing Loopback tests:.
15. Press ≠. Show Module: displays.
16. Enter a module number or press LIST
 to scroll through 
modules. Cards on KSU or Card on Mod X displays.
17. If you want to test cartridges on another module, press 
‘ until the display shows the module.
18. Press ≠. Cd1-KSU or Cd1-ModX displays.
If you want to test the second cartridge on the KSU, press...

CSU stats / 533
P0992638 03Modular ICS 6. 0 Installer Guide
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...

534 / CSU stats
Modular ICS 6.0 Installer GuideP0992638 03
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...

CSU stats / 535
P0992638 03Modular ICS 6. 0 Installer Guide
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...

536 / CSU stats
Modular ICS 6.0 Installer GuideP0992638 03
Checking the CSU alarmsInstaller password required
To check the CSU alarms, start with Performnce stats.
1. Press ‘. Alarm stats displays.
2. Press ≠. Active alarms displays.
Checking active alarms
Installer password required
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...

CSU stats / 537
P0992638 03Modular ICS 6. 0 Installer Guide
Checking bipolar violationsInstaller password required
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
Installer password required
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...

538 / CSU stats
Modular ICS 6.0 Installer GuideP0992638 03
Resetting all statisticsInstaller password required
Start with the display showing Alarm stats:
1. Press ‘. Stats log displays.
2. Press ≠. Reset stats? displays.
3. Press YES
 to erase all the current statistics and begin 
collecting statistics again. 

Diagnostic tools / 539
P0992638 03Modular ICS 6. 0 Installer Guide
Diagnostic tools
The command under this heading allows you to perform a 
warm restart on your system.
1. At the Diagnostic prompt, press ≠. 
Restart system? displays.
2. If you are sure you want to perform a warm start on your 
system, press YES
. Otherwise, press CANCEL. 

540 / Link Status
Modular ICS 6.0 Installer GuideP0992638 03
Link Status
Fractional PRI
When you purchase PRI from your service provider, you can 
request the number of B-channels that are allocated for you to 
use. For example, you may want to use only 12 B-channels 
instead of 23 B-channels. If this is your situation, you should 
disable all the B-channels that you do not need.
It is recommended that the number of lines that are 
deprovisioned on a DTI card (configured as PRI) be the same 
as the...