DS1-BD (DS1 Interface Circuit Pack)
Issue 1 May 2002
8-621555-233-143
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 8-250. Test #143 Minor Alarm Inquiry Test
Error
Code
Tes t
Result Description / Recommendation
ABORT Internal system error
2100 ABORT 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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