Cisco ONS 15454 Troubleshooting Manual page 447

Chapter 2 Alarm Troubleshooting
Step 4 When the affected circuits appear, look in the Type column for VTT, which indicates a VT tunnel circuit.
A VT tunnel with no VTs assigned could be the cause of an UNEQ-P alarm.
If the Type column does not contain VTT, there are no VT tunnels connected with the alarm. Go to
Step 5
Step
If the Type column does contain VTT, attempt to delete these rows:
Step 6
Note
Click the VT tunnel circuit row to highlight it. Complete the
a.
page
If an error message dialog box appears, the VT tunnel is valid and not the cause of the alarm.
b.
If any other rows contain VTT, repeat
c.
If all nodes in the ring appear in the CTC network view, determine whether the circuits are complete:
Step 7
Click the Circuits tab.
a.
Verify that PARTIAL is not listed in the Status column of any circuits.
b.
If you find circuits listed as PARTIAL, use an optical test set to verify that these circuits are not working
Step 8
circuits that continue to pass traffic. For specific procedures to use the test set equipment, consult the
manufacturer.
If the PARTIAL circuits are not needed or are not passing traffic, delete the PARTIAL circuits.
Step 9
Complete the
Recreate the circuit with the correct circuit size. Refer to the "Create Circuits and VT Tunnels" chapter
Step 10
in the Cisco ONS 15454 Procedure Guide.
Log back in and verify that all circuits terminating in the reporting card are active:
Step 11
Click the Circuits tab.
a.
Verify that the Status column lists all circuits as active.
b.
If the alarm does not clear, clean the far-end optical fiber according to site practice. If no site practice
Step 12
exists, complete the procedure in the "Maintain the Node" chapter of the Cisco ONS 15454 Procedure
Guide.
Warning On the OC-192 card, the laser is on when the card is booted and the safety key is in the on position
(labeled 1). The port does not have to be in service for the laser to be on. The laser is off when the
safety key is off (labeled 0). Statement 293
Invisible laser radiation could be emitted from the end of the unterminated fiber cable or connector.
Warning
Do not stare into the beam directly with optical instruments. Viewing the laser output with certain
optical instruments (for example, eye loupes, magnifiers, and microscopes) within a distance of
100 mm could pose an eye hazard. Statement 1056
Warning Use of controls, adjustments, or performing procedures other than those specified could result in
hazardous radiation exposure. Statement 1057
November 2009
7.
The node does not allow you to delete a valid VT tunnel or one with a valid VT circuit inside.
2-275.
"Delete a Circuit" procedure on page
"Delete a Circuit" procedure on
Step 6.
2-275.
Cisco ONS 15454 Troubleshooting Guide, R8.5
2.7.428 UNEQ-P
2-253