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Cisco ONS 15454 Troubleshooting Guide, R8.5
November 2009
Chapter 2 Alarm Troubleshooting
2.7.212 LOM
The Equipment Low Laser Optical Transceiver Temperature alarm applies to the TXP and MXP cards.
LO-LASERTEMP occurs when the internally measured transceiver temperature falls below the card
setting by35.6 degrees F or 2 degrees C. A laser temperature change affects the transmitted wavelength.
(Two degrees Celsius is equivalent to about 200 picometers in the wavelength.)
When the TXP or MXP card raises this alarm, the laser is automatically shut off. The “LOS (OCN)”
alarm on page 2-164 is raised at the far-end node and the “DUP-IPADDR” alarm on page 2-79 is raised
at the near end. To verify the card laser temperature level, double-click the card in node view and click
the Performance > Optics PM > Current Values tabs. Maximum, minimum, and average laser
temperatures are shown in the Current column entries in the Laser Temp rows.
Note For more information about provisioning MXP or TXP PPMs, refer to the “Provision Transponder and
Muxponder Cards” chapter of the Cisco ONS 15454 DWDM Procedure Guide. For more information
about the cards themselves, refer to the Cisco ONS 15454 DWDM Reference Manual.
Clear the LO-LASERTEMP Alarm
Step 1 Complete the “Reset a Traffic Card in CTC” procedure on page 2-270 for the reporting MXP or TXP
card.
Step 2 If the alarm does not clear, complete the “Physically Replace a Traffic Card” procedure on page 2-273
for the reporting MXP or TXP card.
Step 3 If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport
for more information or call Cisco TAC 1 800 553-2447.
2.7.212 LOM
Default Severity: Critical (CR), Service-Affecting (SA) for STSMON, STSTRM, TRUNK;
Major (MJ) for VT-TERM
SONET Logical Objects: STSMON, STSTRM, VT-TERM
DWDM Logical Object: TRUNK
The Optical Transport Unit (OTU) Loss of Multiframe is a VCAT member alarm. (VCAT member
circuits are independent circuits that are concatenated from different time slots into a higher-rate signal.)
The alarm applies to MXP_2.5G_10G, TXP_MR_10G, TXP_MR_2.5G, TXP_MR_10E, or
TXPP_MR_2.5G cards when the Multi Frame Alignment Signal (MFAS) overhead field is errored for
more than five frames and persists for more than 3 milliseconds.
Note For more information about MXP or TXP cards, refer to the Cisco ONS 15454 DWDM Reference
Manual.
Clear the LOM Alarm
Step 1 Complete the “Clear the SD-L Condition” procedure on page 2-220. To clear this alarm against the
DWDM trunk, refer to the Cisco ONS 15454 DWDM Troubleshooting Guide.
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