Specifications

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Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 3 Maintenance
Span Upgrades
Step 9 When cards on each side of the span have been successfully upgraded and all the facility alarms (LOS,
SD, or SF) are cleared, remove the forced switch:
a. In node view, click the Maintenance > Ring tabs.
b. Click either the West Switch or the East Switch field and choose CLEAR from the menu.
c. Click Apply.
The forced switch clears and traffic is running. If you have lost traffic, perform a downgrade. The
procedure for downgrading is the same as upgrading except that you choose a lower-rate card.
Note You cannot downgrade if circuits exist on the STSs that you will remove (the higher STSs).
Step 10 Repeat these steps for each span in the BLSR.
When all spans in the BLSR have been upgraded, the span upgrade is complete.
Procedure: Perform a Manual Span Upgrade on a UPSR
Step 1 Ensure that no alarms or abnormal conditions (regardless of severity), including LOS, LOF, AIS-L, SF,
SD, and FORCED-REQ-RING are present on the span that you will upgrade:
a. In node view, click on the Alarms tab to view a list of current alarms.
b. In node view, click on the Conditions tab and click the Retrieve Conditions button to view a list
of current conditions.
An unresolved alarm or abnormal condition is the most probable reason for upgrade failure.
Step 2 Apply a force switch on the span that you will upgrade:
a. In network view, right-click the span and choose Circuits.
b. From the Circuits on Span dialog box in the Switch All UPSR Circuits Away field, choose FORCE.
c. Click Apply.
Step 3 Remove the fiber from both endpoint nodes in the span and ensure that traffic is still running.
Step 4 Remove the OC-N cards from both span endpoints.
Step 5 For both ends of the span, in node view, right-click on each OC-N slot and choose Change Card.
Step 6 In the Change Card dialog box, choose the new OC-N type.
Step 7 Click OK.
Step 8 When you have finished Steps 5 through 7 for both nodes, install the new OC-N cards in both endpoints
and attach the fiber to the cards.
Wait for the IMPROPRMVL alarm to clear and the cards to become active.
Step 9 When cards on each side of the span have been successfully upgraded and all the facility alarms (LOS,
SD or SF) are cleared, remove the forced switch:
a. In network view, right-click the span and choose Circuits.
b. From the Circuits on Span dialog box in the Switch All UPSR Circuits Away field choose CLEAR.
c. Click Apply.