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Updated the Problem Description and Workaround/Solution Sections.
Updated the Defect Information Section
Migration to new field notice system
|Affected Product ID
Linecards shipped in November and December 2012
Cards shipped in November and December 2012 and in January 2013
Linecards shipped in December 2012
||There were no defects filed with this field notice at the time of publication.|
A limited number of 15454W optical amplifier modules mentioned in the Products Affected section might report a higher temperature due to Teflon tape under the laser diode (LD) is in contact with the heat sink and the printed circuit board assembly (PCBA). When the laser temperature runs higher than the limit of 50 degrees Celsius, then the risk of insufficient heat dissipation occurs due to inadequate contact to the heat sink.
15454W: AMP-C, RAMP-C, and RAMP linecards with a serial number provided could potentially determine a traffic outage in the case of a higher temperature that rises from the internal LD of the optical module. Teflon tape was left below the LD case and this might prevent a full thermal dissipation in normal conditions. If the temperature rises above the maximum allowed value, the LD shuts down.
The Deg. Temp alarm or Fail Temp alarm might be triggered by the affected linecards. The impacted linecards are captured in the "How To Identify Affected Products" section.
There is no identified workaround for this issue. Cisco recommends replacement of the affected linecards on failure. Affected linecards can be identified by the serial number. This field notice contains a Serial Number Validation tool which allows customers to confirm their affected hardware. The link to this Serial Number Validation tool is located in the "How to Identify Affected Products" section.
How To Identify Affected Products
In order to determine the serial number of your linecards, complete these steps:
- Open the Cisco Transport Controller.
- From the Shelf View, select Inventory.
- From the Inventory tab, locate the linecard in question and compare the information from the Inventory tab. Compare the serial numbers against the serial number validation tool provided.
If you use TL1 commands, complete these steps:
Compare the information from the TL1 inventory command against the serial number validation tool provided.
A serial number validation tool is provided so customers can easily check their hardware's serial number to identify affected units.
Serial Number Validation Tool
Serial Number Validation
Cisco provides a tool to verify whether a device is impacted by this issue. In order to check the device, enter the device's serial number in the Serial Number Validation Tool.
Note: For security reasons, you must click on the Serial Number Validation Tool link provided in this section to check the serial number for the device. Use of the Serial Number Validation Tool URL external to this field notice will fail.
For More Information
If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:
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