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Upgrade Program removed. Replacements now done through normal RMA process
|Affected Product ID
||There were no defects filed with this field notice at the time of publication.|
In some Cisco 809 Integrated Services Router (IR809) units, the capacitor leads were not trimmed to specification. This can cause a short circuit between the DC power terminals and the chassis. Customers who power the chassis with negative DC power are more likely to see this issue. The failure occurs when a negative power supply is used, such as when operating at -48VDC.
The type of fault that is observed in the IR809 unit (capacitor lead short circuit to the chassis) is not considered a safety hazard.
Note: All of the IR809 units with serial numbers that begin with JMX2022 and higher are not affected.
Cisco is aware of one occurrence where an IR809 unit experienced this issue in a customer environment.
When a negative power supply is used and the chassis is connected to ground, an IR809 unit with affected capacitor pins blows the internal fuse once powered up.
An IR809 unit that is powered by a positive power supply continues to operate normally. However, the hold-up time during loss of power might be diminished.
Customers who power their IR809 units with negative DC power, and whose units have serial numbers that begin with JMX2021 or lower, should replace the units through the normal RMA process.
Customers who do not rely on the hold-up time and power their IR809 units with positive DC power, and whose units have serial numbers that begin with JMX2021 or lower, can continue to use the IR809 as-is.
Note: All of the IR809 units with serial numbers that begin with JMX2022 or higher are not affected.
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