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Cisco ONS 15310-MA SDH Troubleshooting Guide, Release 9.0
78-18663-01
Chapter 2 Alarm Troubleshooting
Frequently Used Alarm Troubleshooting Procedures
Note If ports managed into unlocked administrative state are not receiving signals, the LOS alarm is
either raised or remains, and the port service state transitions to unlocked-disabled,FLT.
Clear an STM-N Port XC Loopback Circuit
Step 1 Log into a node on the network. If you are already logged in, continue with Step 2.
Step 2 Double-click the reporting card in CTC to display the card view.
Step 3 Click the Maintenance > Optical > Loopback > SDH VC tabs.
Step 4 Uncheck the XC loopback check box.
Step 5 Click Apply.
Clear a DS-3 or E1 Port Loopback Circuit
Step 1 Log into a node on the network. If you are already logged in, continue with Step 2.
Step 2 Double-click the ONS 15310-MA SDH in CTC to display the card view.
Step 3 Click the Provisioning > DS3 or the Maintenance > E1 tabs.
Step 4 In the Loopback Type column, determine whether any port row shows a state other than None.
Step 5 If a row contains another state besides None, click in the column cell to display the drop-down list and
select None.
Step 6 In the Admin State column, determine whether any port row shows a state other than unlocked.
Step 7 If a row shows a state other than unlocked, click in the column cell to display the drop-down list and
select unlocked.
Step 8 Click Apply.
Note If ports managed into unlocked administrative state are not receiving signals, the LOS alarm is
either raised or remains, and the port service state transitions to unlocked-disabled,FLT.
Clear an E3 Port Loopback
Step 1 Log into a node on the network. If you are already logged in, continue with Step 2.
Step 2 Double-click the reporting card in CTC to display the card view.
Step 3 Click the Maintenance > E3 > Loopback tabs.
Step 4 In the Loopback Type column, determine whether any port row shows a state other than None.
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