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DS1-BD (DS1 Interface Circuit Pack)
Issue 1 June 2005 1017
Slip Alarm Inquiry Test (144)
Slips occur when transmitter and receiver are not running at precisely the same clock rate. The
DS1 Interface circuit pack can detect both positive and negative slips on the DS1 facility. The
Slip Alarm Inquiry test is used to acquire the total number of slips occurred on a DS1 link.
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 (TDM Bus)
on page 2237 and
SYNC (Port-Network Synchronization)
on page 2143 for details.
0
NO
BOARD
The test could not relate the internal ID to the port (no board).
This could be due to incorrect translations, no board is inserted, an
incorrect board is inserted, or an insane board is inserted.
1. Verify that the board’s translations are correct. Use add ds1
location to administer the DS1 interface if it is not already
administered.
2. If board was already administered correctly, check the error log to
determine whether the board is hyperactive. If so, the board was shut
down. Reseating the board will re-initialize it.
3. If the board was found to be correctly inserted in step 1, enter
busyout board
4. Enter reset board
5. Enter release board
6. Enter test board long
This should re-establish the link between the internal ID and the port.
Table 349: Test #143 Minor Alarm Inquiry Tests (continued)
Error
Code
Test
Result
Description / Recommendation
3 of 3