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Cisco ONS 15454 DWDM Troubleshooting Guide, R7.0.1
78-17742-02
Chapter 1 General Troubleshooting
1.13.2 VOA Failure Scenarios
• The output power value must be within the expected range (refer to the “Hardware Specifications”
appendix in the Cisco ONS 15454 DWDM Reference Manual). If the trunk port PM is not available
through CTC, perform a manual measurement using a standard power meter.
If the TX laser is active, the wavelength is provisioned properly, and the output power value is in the
correct range, go to Step 4. Otherwise, take the appropriate corrective action, including card replacement
if the output power value is outside of the expected range (refer to the “Add and Remove Cards and
Nodes” chapter of the Cisco ONS 15454 DWDM Procedure Guide. Replacing the card should correct the
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
Step 4 If the TXP or MXP card behaves as expected, the only remaining root cause is the fiber connection
between the two cards:
a. Verify that the ADD_RX port of the alarmed 32WSS is connected to the TRUNK_TX port of the
TXP or MXP card using an MPO-LC multifiber cable.
Note A patch-panel tray is normally used to manage fiber connections (for patch-panel cabling
details, refer to the “Turn Up a Node” chapter in the Cisco ONS 15454 DWDM Procedure
Guide).
b. Check and clean the LC fiber fan-out according to site practice. The fiber numbers (1 to 8) must
correspond to the wavelength managed.
c. If a patch panel is used, check and, if necessary, clean the LC-LC adapter. If necessary, replace any
bad devices (maximum tolerance is 1 dB).
d. Pull out the LC connector from the TRUNK_TX port of the TXP or MXP card and clean the fiber
according to site practice.
Note 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.
Note If the alarm condition has not cleared, 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.
Step 5 When the alarmed card is a 32MUX-O, the troubleshooting procedure should start from the TXP, MXP,
or line card. Verify the correct behavior of the TXP, MXP, or line card connected to the 32MUX-O:
• The TX laser must be active (trunk port is in IS [or Unlocked] state).
• The wavelength provisioned must be the proper one.
• The output power value must be within the expected range (refer to the “Hardware Specifications”
appendix in the Cisco ONS 15454 DWDM Reference Manual). If the trunk port PM is not available
through CTC, perform a manual measurement using a standard power meter.
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