Cisco ONS 15454 SDH Specifications download pdf (Page 52)

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Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3

May 2002

Chapter 1 Alarm Troubleshooting

Alarm Procedures

Step 2 On the node reporting the alarm, check the physical connections from the cards to the fiber cables that

are configured to carry DCC traffic.

Step 3 Verify that both ends of the fiber span have in-service ports by checking that the ACT LED on each

STM-N card is illuminated.

Step 4 Verify that the DCC is provisioned for the ports at both ends of the fiber span:

a. Under the node view, click the Provisioning > SDH DCC tabs.

b. If the slot and port are listed under SDCC Terminations, the DCC is provisioned.

c. If the slot and port are not listed under the SDCC terminations, click Create.

d. Click the STM-N card that links to the adjacent node.

e. Click OK.

f. Repeat Steps a – e at the adjacent nodes.

Step 5 Verify that the STM-N port is active and in service:

a. Confirm that the STM-N card shows a green LED by viewing CTC or viewing the physical card. A

green LED indicates an Active card. A yellow LED indicates a Standby card.

b. To determine whether the STM-N port is in service, double-click the card in CTC to display the

card-level view.

c. Click the Provisioning > Line tabs.

d. Verify that the Status column lists the port as In Service.

e. If the Status column lists the port as Out of Service, click the column and select In Service.

f. Click Apply.

Step 6 With a test set, check for signal failures on fiber terminations.

Caution Using a test set will disrupt service on the STM-N card. It may be necessary to manually

switch traffic carrying circuits over to a protection path.

Step 7 Measure power levels to verify that the budget loss is within the parameters of the receiver.

Step 8 Ensure that fiber cable connectors are securely fastened and properly terminated.

Caution Resetting the active TCC-I can result in loss of traffic.

Step 9 Reset the active TCC-I by performing the “Reset the TCC-I using a Card Pull” procedure on page 4-5.

Resetting the active TCC-I switches the traffic to the standby TCC-I. If the alarm clears when the

ONS 15454 SDH switches to the standby TCC-I, the user can assume that the original active TCC-I is

the cause of the alarm.

Step 10 Replace the original active TCC-I with a new TCC-I card.

Step 11 Delete and recreate the problematic SDCC termination:

a. Click the Provisioning > SDH DCC tabs.

b. Highlight the problematic SDCC termination.

c. Click Delete.

d. Click Yes at confirmation dialog box.

Step 12 Verify that both ends of the SDCC have been recreated at the optical ports.

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Cisco ONS 15454 SDH Specifications Page 52