Specifications

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Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 1 Alarm Troubleshooting
Step 7 Verify that the correct port is in-service.
Caution Using a test set will disrupt service on the optical card. It may be necessary to manually switch
traffic carrying circuits over to a protection path.
Step 8 Use an optical test set to verify that a valid signal exists on the line.
Test the line as close to the receiving card as possible.
Step 9 Clean the fiber:
a. Clean fiber according to local site practice.
b. If no local practice exists, use a CLETOP Real-Type or equivalent fiber-optic cleaner and follow the
instructions accompanying the product.
Step 10 Verify that the power level of the optical signal is within the OC-N card’s receiver specifications. The
“Optical Card Transmit and Receive Levels” section on page 2-35 lists these specifications.
Step 11 If there is a valid signal, replace the connector on the backplane.
Step 12 Repeat Steps 1 - 5 for any other ports on the card.
Step 13 Replace the protect standby OC-N card.
Step 14 If the alarm does not clear after the protect standby OC-N card is replaced, replace the working active
OC-N card:
a. Right click the working active card, and click Reset Card.
b. Verify that the standby protect card becomes active. The green active LED will light up on the card
on both the CTC screen and on the physical card.
c. Replace the now working standby OC-N card.
Note When you replace a card with an identical type of card, you do not need to make any changes
to the database.
Step 15 If the alarm does not clear after you replace both cards, follow Steps 4 - 14 for each of the nodes in the
ring.
Step 16 Log on to http://www.cisco.com/tac for more information or call the Cisco Technical Assistance Center
to report a service-affecting problem (1-877-323-7368).
1.3.46 FAILTOSWS
• Major, Service affecting
This alarm signals an APS span switch failure. For four-fiber BLSR, a failed span switch initiates a ring
switch. If the ring switch occurs, the FAILTOSWS alarm will 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 “Clear the FAILTOSWR Alarm on a Four-Fiber BLSR Configuration” section
on page 1-35.