Cisco ONS 15454 DWDM Manual page 95

Chapter 1 General Troubleshooting
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e. Click Circuits.
Delete the OCHNC circuit for the faulty channel.
f.
Ensure that the service state of the corresponding ADD-RX port changes to IS-AINS (or
g.
Unlocked,automaticInService) and that the color changes to grey (LOS-P alarm should clear).
h. Recreate the OCHNC circuit and verify that Circuit Status field reports DISCOVERED and the state
is IS (Unlocked).
i. If the LOS-P alarm has not cleared, continue with
corrected.
To unambiguously pinpoint the root cause of the alarm, verify the proper cabling of the EXP_RX port
Step 8
(which is the common input port for all the pass-through channels) on the 32WSS card:
The EXP_RX port of the alarmed 32WSS card must be connected to the EXP_TX port of the
a.
coupled 32WSS card on the opposite side of the node.
Pull out the LC connector from the EXP_RX port of the 32WSS card and clean the fiber according
b.
to site practice.
Pull out the LC connector from the EXP_TX port of the coupled 32WSS card and clean that
c.
connector also.
Verify that the fiber attenuation is within the specifications (maximum tolerance is 1 dB).
d.
If necessary, replace any bad fibers.
e.
Note
Note
If the alarm condition persists even after the checking and fixing the fibers, replace the 32WSS card
f.
(refer to the "Add and Remove Cards and Nodes" chapter of the Cisco ONS 15454 DWDM
Procedure Guide). Before replacing the card, log into the Technical Support Website at
http://www.cisco.com/techsupport for more information or call Cisco TAC (1 800 553-2447) in
order to report a service-affecting problem).
Warning High-performance devices on this card can get hot during operation. To remove the card, hold it by
the faceplate and bottom edge. Allow the card to cool before touching any other part of it or before
placing it in an antistatic bag. Statement 201
Verify the correct behavior of the VOA inside the 32MUX-O card:
Step 9
a. Double-click the 32MUX-O card.
b. Click Circuits.
c. Delete the OCHNC circuit for the faulty channel.
Ensure that the service state of the corresponding ADD-RX port changes to IS-AINS (or
d.
Unlocked,automaticInService) and that the color changes to grey (LOS-P alarm should clear).
78-17742-02
Click Apply. If the LOS-P alarm persists, continue with this procedure. Otherwise, the problem
has been corrected.
Before disconnecting any optical amplifier card fiber for troubleshooting, ensure that the
optical amplifier card is unplugged.
If no site practice exists for cleaning fibers, complete the procedure in the "Maintain the
Node" chapter of the Cisco ONS 15454 DWDM Procedure Guide.
Step 8. Otherwise, the problem has been
Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1
1.13.2 VOA Failure Scenarios
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