Failtosws; Fan - Cisco ONS 15327 User Documentation

Chapter 14 Alarm Troubleshooting
Clean the fiber:
Step 9
a.
b.
Verify that the power level of the optical signal is within the OC-N card receiver specifications.
Step 10
Repeat Steps 1 to 5 for any other ports on the card.
Step 11
Replace the protect standby OC-N card.
Step 12
If the alarm does not clear after you replace the BLSR cards on this node one by one, follow Steps 4 to
Step 13
14 for each of the nodes in the ring.
Login to http://www.cisco.com/TAC for more information or call the Cisco Technical Assistance Center
Step 14
to report a service-affecting problem (1-800-553-2447).

14.4.45 FAILTOSWS

•
This failure to switch to protection span signals an APS span switch (FAILTOSWS) alarm occurs for a
four-fiber BLSR if a failed span switch initiates a ring switch. If the ring switch occurs, the FAILTOSWS
alarm does not appear. If the ring switch does not occur, the FAILTOSWS alarm appears. FAILTOSWS
clears when one of the following actions occur: a higher priority event, such as a user-switch command
occurs, the next ring switch succeeds, or the cause of the APS switch (such as an SF or SD alarm) clears.
Follow the procedure for
page

14.4.46 FAN

•
The failure of the cooling fan-tray alarm indicates a problem with the fan-tray assembly. When the fan
is not fully functional, the temperature of the ONS 15327 can rise above its normal operating range. The
fan tray contains six fans and needs a minimum of five working fans to properly cool the ONS 15327.
However, even with five working fans, the fan tray can need replacement because a sixth working fan is
required for extra protection against overheating.
Always use the supplied ESD wristband when working with a powered ONS 15327. Plug the wristband
Caution
cable into the ESD jack located on the lower-right outside edge of the shelf assembly.
Procedure: Clear the FAN Alarm
Step 1 Check the condition of the air filter to see if it needs replacement.
Step 2 If the filter is clean, take the fan-tray assembly out of the ONS 15327.
Reinsert the fan tray making sure the back of the fan tray connects to the rear of the ONS 15327.
Step 3
June 2002
Clean fiber according to local site practice.
If no local practice exists, use a CLETOP Real-Type or equivalent fiber-optic cleaner and follow the
instructions accompanying the product.
Not Alarmed (NA) (Condition)
"Clear the FAILTOSWR on a Four-Fiber BLSR Configuration" section on
14-38.
Critical, Service-Affecting
Cisco ONS 15327 User Documentation, R3.3
Alarm Procedures
14-39