Revised June 28, 2013
June 19, 2013
THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.
Revision Date Comment 2.0 28-JUN-2013 Updated Linecard Information 1.0 19-JUN-2013 Initial Public Release
Products Affected Top Assembly Printed Circuit Assembly Comments HW Rev Part # Rev. Part # Rev. 15454-OPT-AMP-C 800-28144-07 -D0 73-10497-05 -C0 Linecards shipped in November and December 2012 07 15454-OPT-RAMP-C= 800-29479-03 -C0 73-11375-02 -D0 Cards shipped in November and December 2012 and in January 2013 03 15454-OPT-RAMP-CE= 800-32683-02 -C0 73-11375-02 -D0 Linecards shipped in December 2012 02
On some 15454W optical amplifier modules, 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 Hardware Levels" section.
There is no identified workaround for this issue. Cisco recommends replacement of the affected linecards, which are 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 Hardware Levels" section.
How To Identify Hardware Levels
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.
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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