DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1388SNC-BD (Switch Node Clock Circuit Pack)
9
3. If a single SNI has SNI-BD error 257, replace the SNI circuit pack.
4. Replace the standby SNC circuit pack.
5. Retry the
test board
command. Check the error log via
display
errors
. If this error is still in the error log, replace the active SNC.
f. This error occurs when the firmware detects problems with the various
hardware circuit monitors (e.g. loss of reference monitor) that verify correct
operation of the reference links.
Replace the SNC circuit pack.
g. This error occurs when the firmware detects problems with the interface
used to track the status of both SNCs when there are duplicated SNCs in a
switch node carrier. When this error occurs, software may have incorrect
information from SNC firmware for which SNC is active. Therefore, the
yellow LEDs on the SNCs must be checked in the following repair
procedure and the
status switch-node
command should not be used
when this error type occurs.
If the switch node carrier has duplicate SNCs:
1. Replace the SNC that does not have its yellow LED lit.
2. Retry the
test board
command. Check the error log via
display
errors
. If this error is still in the error log, replace the SNC that has
its yellow LED lit.
If the switch node carrier has only one SNC, replace the SNC.
h. This error occurs whenever a loss of signal from the SNC on-board
Stratum 3 oscillator is detected by the firmware.
Replace the SNC circuit pack.
i. These errors occur whenever firmware detects failure of the phase-locked
loop, inability to lock, or failure of the clock drivers and the problem is
on-board.
Replace the SNC circuit pack.
If the error persists, follow normal escalation procedures.
j. This error occurs when the firmware detects problems with the
microcontroller used for Timing Priority Number processing.
Replace the SNC circuit pack.
