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Cisco 1700 Series Modular Access Routers

Field Notice: *Expired* - FN - 11391- Fan not Operational on the Cisco 1720, 1750, and 1751


Archived September 4, 2007

Expired February 28, 2002

August 11, 2000

THIS FIELD NOTICE HAS BEEN ARCHIVED AND IS NO LONGER MAINTAINED OR UPDATED BY CISCO.

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE, WARRANTY OR SUPPORT. USE OF THE INFORMATION ON THIS FIELD NOTICE OR MATERIALS LINKED FROM THIS FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.


Products Affected

  • Cisco 1720

  • Cisco 1750

  • Cisco 1751

Problem Description

Fans in the Cisco 1720, 1750, and 1751 routers are not running when the ambient temperature is below 45°C (115°F) measured on the outside of the router case.

Background

The fans are designed to only run if the ambient temperature reaches 45°C or 115°F (+/- 8°C) measured on the outside of the router case.

Problem Symptoms

The fan is not constantly rotating when the unit is powered up. This can be incorrectly interpreted as a defective fan.

Workaround/Solution

No return materials authorization (RMA) is necessary.

The fan is fully functional. The fan was designed to activate when the ambient temperature reaches 45°C or 115°F (+/- 8°C) measured on the outside of the router case.

Please refer to the Release Notes for the Cisco 1700 Series for Cisco IOS Release 12.0 T.

Revision History

Revision

Date

Comment

1.0

11-AUG-2000

Initial Public Release

1.1

28-FEB-2002

Expired

1.2

04-SEP - 2007

Archived

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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