Cisco ONS 15454 Series Multiservice Provisioning Platforms

Field Notice: 15454E-FTA-48V= Class AC Upgrade

Revised March 8, 2004

February 5, 2003

Products Affected


Top Assembly

HW Rev.

Part Number








Problem Description

  1. 15454E-FTA-48V= PLD is being updated to allow compatibility with the XCVXL card.

  2. Resistor changes to the Fan Control Card are also being made to eliminate a false Fan Fail alarm on CTC (SW only) when the FTA operates with the XCVXL at 50�‹ C.

  3. Testing indicates that the ETSI fan tray does not meet the conducted emission requirements (European requirement per EN 300386) at lower fan speeds. Specifically, the conducted emissions at two frequencies exceed the acceptable limits when the fans are running at lower speeds.

  4. Capacitor changes to address a condition on the 15454E-FTA-48V= where capacitors in the power filter circuit could fail. Failure of these capacitors generally does not affect performance of the FTA. However, the result of the failure is creation of a direct path between the two battery inputs where voltage may be presented on the MIC card in the ETSI shelf if a properly installed power cable is not present on the MIC.


These issues were discovered during product compliance testing and product integration testing.

Problem Symptoms

  • When the fan is running with the XCVXL, a False Fan alarm can be seen on the CTC when running at higher temperatures (above 50�‹C).

  • The fan tray does not meet European conducted emission requirements (EN-300386). It fails the requirement by up to 9 dB.

  • Unexpected voltage may be present on the MIC power connector. This would be indicated in CTC by showing both Battery A and Battery B active in the CTC software monitor, even if there is no power to one of the two MICs.

  • The unexpected presence of voltage on the MIC power connector is not an issue if the power cable is installed in accordance with the applicable user documentation. If this condition exists, it can be confirmed by powering the shelf with a single battery supply. Even though one supply is active, both Battery A and Battery B will show as active in the software monitor.

  • Failure of the Fan Tray assembly capacitors or the non-compliant conducted emission condition will typically not be detectable by the customer operating in a standard dual (A and B) power configuration.


Contact the Cisco Technical Assistance Center (TAC) to request an updated unit.

It is strongly recommended that all customers utilize this upgrade process to acquire 15454-FTA-48V units that are fully compliant with EU Conducted Emissions, provide isolation between Battery A and Batttery B, and contain the PLD changes needed for interoperability with the XCVXL.


To follow the bug ID link below and see detailed bug information, you must be a registered user and you must be logged in.




FTA Fails Conducted emission at lower speed

How To Identify Hardware Levels

To determine the Part Number, Hardware Revision and Serial Number of your 15454E FTA:

  1. Open CTC.

  2. From the Shelf View, select Inventory.

  3. From the Inventory tab, locate the FTA and compare the information from the Products Affected section above.


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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