Specifications

4-23
Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3
May 2002
Chapter 4 Maintenance
Span Upgrade
Figure 4-19 Completing the Span Upgrade
Step 18 Click Finish.
4.5.2 Manual Span Upgrades
The manual upgrade procedures require at least two technicians (one at each end of the span). The
technicians must be able to communicate with each other during the upgrade. The upgrade procedures
do not affect service. They cause no more than three switches with switch times of less than 50 ms.
During upgrade, some minor alarms and conditions occur and clear automatically. However, no
service-affecting alarms (SA, Major, or Critical) should be expected. If any service-affecting alarms
occur, Cisco recommends backing out of the procedure. Choose from four manual span upgrade options:
• Manually Upgrade a Span on a Two-Fiber MS-SPRing, page 4-23
• Manually Upgrade a Span on a Four-Fiber MS-SPRing, page 4-24
• Manually Upgrade a Span on an MSP, page 4-25
• Manually Upgrade a Span on a 1+1 group, page 4-26
Procedure: Manually Upgrade a Span on a Two-Fiber MS-SPRing
Note All lines connecting the nodes in an MS-SPRing must be upgraded before the added bandwidth is
available.
Step 1 In the node view of the CTC software, click on the Conditions tab.
Step 2 Click the Retrieve Conditions. Ensure no alarms or abnormal conditions are present on the span to be
upgraded.
Purpose This procedure manually upgrades a span on a two-fiber MS-SPRing.
Tools/Equipment —
Prerequisite procedures —
Required/As Needed As needed
On Site/Remote On Site