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DS1-BD (DS1 Interface Circuit Pack)
Issue 1 June 2005 1015
Minor Alarm Inquiry Test (#143)
The Minor alarm raised by a DS1 Interface circuit pack indicates that the average bit error rate
on the DS1 facility is greater than 1/1,000,000, but less than 1/1000. The Minor Alarm Inquiry
test is used to determine that the received DS1 bit error rate is greater than 1/1,000,000 and
less than 1/1000. When D4 framing mode is selected, the DS1 Interface circuit pack takes 41
minutes to recognize and report a Minor alarm and 41 minutes to recognize and report that a
Minor alarm condition is cleared. If ESF framing mode is selected, the DS1 Interface circuit pack
takes 10 minutes to recognize and report a Minor alarm and 10 minutes to recognize and report
that a Minor alarm condition is cleared.
When the DS1 Interface circuit pack detects a Minor alarm condition, it will send a
MINOR-ALARM message to the maintenance software. After the maintenance software
receives a MINOR-ALARM message, the Minor Alarm Inquiry test is initiated to confirm the
Minor alarm. All trunks on the circuit pack are kept in the in-service state after the Minor alarm is
confirmed. The Minor Alarm Inquiry test is run every 10 minutes until the Minor alarm is cleared.
Table 349: Test #143 Minor Alarm Inquiry Tests
Error
Code
Test
Result
Description / Recommendation
ABRT Internal system error
2100 ABRT Could not allocate the necessary system resources to run this test.
1. Retry the command at 1-minute intervals up to 5 times.
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