Field Notice: FN - 70264 - Limited Set of CGR1120 and CGR1240 Units Might Experience GPS Failures - Workaround Provided

Notice

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 History

Revision	Publish Date	Comments
1.4	02-Jun-23	Updated the Problem Description, Problem Symptom, and Workaround/Solution Sections and Removed the Serial Number Validation and Upgrade Program Information Sections
1.3	16-Dec-22	Updated the Upgrade Program to use Support Case Manager (SCM)
1.2	27-Sep-19	Updated the Workaround/Solution Section
1.1	20-Sep-19	Initial External Release
1.0	28-Sep-18	Initial Release

Products Affected

Affected Product ID	Comments
CGR1120/K9
CGR1240/K9

Defect Information

Defect ID	Headline
CSCvi63921	CGR1K - GPS Fails with "No GPS Signal Available" or "Weak GPS Signal, may not be accurate"

Problem Description

A limited number of CGR1120 and CGR1240 units might experience GPS failures.

For CGR1120/K9 and CGR1240/K9 units that are in a fixed location, a workaround is available.

For CGR1120/K9 and CGR1240/K9 units that are not in a fixed location, contact the Cisco Technical Assistance Center (TAC).

Background

GPS failures were seen in a customer environment prior to deployment in the field. The root cause was identified as damaged inductors, which supply voltage to the integrated active GPS antenna. The damage is the result of an overcurrent condition in one of the manufacturing environments.

Problem Symptom

Customers might see one of these messages when a GPS failure occurs by entering the show platform gps location command:

• Cisco IOS^® - “No GPS Signal Available” or “Weak signal, reading may not be accurate”
• CG-OS - "Unable to communicate with GPS"

Note: If the CGR is already in service, the fixed GPS coordinates will not change in Field Network Director (FND). The GPS coordinates will continue to show in the FND map as the same fixed location.

Workaround/Solution

For CGR1120/K9 and CGR1240/K9 units that are in a fixed location, a workaround is available. Complete these steps in order to input the GPS coordinates into FND.

If the CGR is not deployed to a fixed location and GPS coordinates are required, the customer can contact Cisco TAC for assistance.

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:

• Open a service request on Cisco.com
• By email
• By telephone

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