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 p ack.
4. Replace the standby SNC circ uit pack.
5. Retry the test board command. Check the error log via display
errors. If this error is still in the error log, replac e the active SNC.
f. This error occurs when the firmware detects p roblems with the various
hardware circuit monitors (e.g . loss of reference monitor) that verify correct
operation of the reference links.
Replace the SNC circuit pac k.
g. This error occurs when the firmware detec ts problems with the interface
used to track the status of both SNCs when there are dup licated SNCs in a
switch node carrier. When this error occ urs, software may have incorrect
information from SNC firmware for which SNC is active. Therefore, the
yellow LEDs on the SNCs must be checked in th e following repair
procedure and the status switch-node command should not be used
when this error type occurs.
If the switch node carrier has d uplicate 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, rep lace the SNC that has
its yellow LED lit.
If the switch node carrier ha s only one SNC, replace the SNC.
h. This error occurs whenever a loss of signal from the SNC on-b oard
Stratum 3 oscillator is detected b y the firmware.
Replace the SNC circuit pac k.
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 pac k.
If the error persists, follow normal escalation procedures.
j. This error occurs when the firmware detects p roblems with the
microcontroller used for Timing Priority Numb er processing.
Replace the SNC circuit pac k.