User Guide

DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-555DS1-BD (DS1 Interface Circuit Pack)
10
When the Red alarm is cleared, the DS1 Interface circuit pack will stop
transmitting the Yellow alarm to the remote DS1 endpoint. The maintenance
software restores all trunks of the DS1 Interface circuit pack to the service state
before the Red alarm occurs.
Loss of Multiframe Alarm: If the DS1 Interface circuit pack is administered using
DMI-BOS signaling, the DS1 Interface circuit pack raises a Loss of Multiframe
Alarm (LMA) when it cannot interpret the incoming signaling bits to synchronize
to the multiframe pattern received in the 24th channel. Once DS1 Interface circuit
pack detects an LMA, the circuit pack will transmit a Remote Multiframe Alarm
(RMA) to the remote DS1 endpoint. Maintenance software handles both Red
alarm and LMA alarm(s) using the same mechanism.
Table 10-152. TEST #140 Red Alarm Inquiry Test
Error
Code
Test
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 a maximum of 5 times.
2000 ABORT Response to the test was not received within the allowable time period. This
may be due to hyperactivity. Error type 1538 in the error log indicates
hyperactivity. The hyperactive circuit pack is out of service and one or more of
the following symptoms may be exhibited.
1. The DS1-BD tests (such as test 138 and test 139) are aborting with error
code 2000.
2. The tests run on the ports of this circuit pack are returning a no board
result.
3. A busyout or a release command has no affect on the test results.
4. A list config command shows that the circuit pack and the ports are
properly installed.
NOTE:
When hyperactivity occurs, the circuit pack is isolated from the system,
and all of the trunks for this circuit pack are placed into the out of service
state. The system will try to restore the circuit pack within 15 minutes.
When no faults are detected for 15 minutes, the DS1 interface circuit
pack is restored to normal operation. All of the trunks for the DS1
interface circuit pack are then returned to the in service state.
Hyperactivity is often caused by the associated facility. In such a case,
faults (such as slips, misframes, or blue alarms) would be entered in the
error log. In addition, many hardware errors would be logged against the
associated trunk circuits. If the facility is OK and the error occurs again
after 15 minutes, replace the circuit pack.
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