User manual

DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-512DS1-BD (DS1 Interface Circuit Pack)
10
When the DS1 Interface circuit pack detects a slip condition, the circuit pack will
increase the on-board slip counter by 1. A SLIP-COUNT message is
spontaneously sent to the system software after the counter reaches a threshold
(for example, 88). When the maintenance software receives the SLIP-COUNT
message, the Slip Alarm Inquiry Test is initiated to query the slip counters on DS1
Interface circuit pack and total the slip counts in the maintenance software.
If the count of slips is over the threshold, a Minor alarm is raised against the DS1
Interface circuit pack. All trunks of the DS1 Interface circuit pack are still in the
in-service state. If the DS1 Interface circuit pack is used to supply the system
synchronization source, the MINOR alarm will initiate a synchronization source
switch. See “TDM-BUS” and "SYNC (Synchronization)" for details.
Table 10-171. TEST #144 Slip 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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