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Chapter 2 Alarm Troubleshooting
When the LEDs on the STM-N cards are correctly illuminated, complete the
Step 4
Node DCC Terminations" procedure on page
Step 5
Repeat
If DCC is provisioned for the ends of the span, verify that the port is active and in service by completing
Step 6
the following steps:
a.
Confirm that the STM-N card shows a green LED in CTC or on the physical card.
A green SRV LED indicates an active card.
To determine whether the port is in service, double-click the card in CTC to display the card view.
b.
Click the Provisioning > Line tabs.
c.
Verify that the Admin State column lists the port as Unlocked.
d.
If the Admin State column lists the port as Locked,maintenance or Locked,disabled, click the
e.
column and click Unlocked from the drop-down list. Click Apply.
Note
Step 7
For all nodes, if the card is in service, use an optical test set to determine whether signal failures are
present on fiber terminations. For specific procedures to use the test set equipment, consult the
manufacturer.
Using an optical test set disrupts service on the STM-N card. It could be necessary to manually switch
Caution
traffic carrying circuits over to a protection path. Refer to the
Initiation, and Clearing" section on page 2-123
If no signal failures exist on terminations, measure power levels to verify that the budget loss is within
Step 8
the parameters of the receiver. See the
on page 1-74
If budget loss is within parameters, ensure that fiber connectors are securely fastened and properly
Step 9
terminated. For more information refer to the "Install Cards and Fiber-Optic Cable" chapter in the
Cisco ONS 15600 SDH Procedure Guide.
If fiber connectors are properly fastened and terminated, complete the
Step 10
procedure on page
Wait ten minutes to verify that the card you reset completely reboots and becomes the standby card.
Resetting the active TSC card switches control to the standby TSC card. If the alarm clears when the
ONS 15600 SDH node switches to the standby TSC card, the user can assume that the previously active
card is the cause of the alarm.
If the TSC card reset does not clear the alarm, delete the problematic RS-DCC termination by completing
Step 11
the following steps:
a.
From card view, click View > Go to Previous View if you have not already done so.
Click the Provisioning > Comm Channels > RS-DCC tabs.
b.
Highlight the problematic DCC termination.
c.
Click Delete.
d.
Click Yes in the Confirmation Dialog box.
e.
July 2010
Step 4
at the adjacent nodes.
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,failed.
for information.
2-130.
2-139.
"2.8.2 Protection Switching, Lock
for commonly used switching procedures.
"1.9.3 Optical Traffic Card Transmit and Receive Levels" section
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
2.6.42 EOC
"2.8.5 Verify or Create
"Soft-Reset a Card Using CTC"
2-43
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Table of Contents
Troubleshooting
