
432 Chapter 10 Testing, Troubleshooting, and Diagnostics
P0609330 2.0
• the number of milliseconds of short term alarms (loss of signal LOS, out of frame OOF, alarm
indication signal AIS, remote alarm indication RAI) in the last minute. A short term 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.
Enable the internal CSU
Use the following procedure to enable the internal CSU to gather performance statistics for your
T1 lines or PRI with public interface.
1 Choose
Resources, Media Bay Modules.
The window displays Bus 02 through to 08.
2 Choose the appropriate bus. For example, Bus 02.
3 Choose
Modules on Bus.
The modules on this bus appear.
4 Choose the appropriate module. For example, Module 1.
5 Click the
T1 Parameters heading.
6 In the
Internal CSU box, click On.
The module is temporarily disabled while the internal CSU is enabled.
Check the performance statistics
1 Choose Diagnostics, Trunk Modules.
2 Choose the appropriate bus that contains the module that you want to check.
3 Choose Module #,
CSU statistics, Performance statistics.
4 Click the Current interval heading to display the duration of the current 15 minute interval
of the selected card, the number of errored seconds (ES), the number of severely errored
seconds (SES) and the number of unavailable time seconds (UAS).
Business Communications
Manager 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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