Firmware-stack trace
In rare instances, you might need to work with a call-center escalation agent to find the source of a
49.XXXX ERROR. Use the firmware-stack trace procedure to collect data that the agent might need.
A firmware-stack trace indicates which firmware commands were executing at the time of the error.
The firmware-stack trace procedure does not produce a report. Instead, you must write down the
firmware instructions that appear on the control-panel display and relay them to the agent.
1. When the error message appears on the control-panel display, press 6 and then press 5.
2. Press 9 to scroll through each line of the firmware-stack trace.
464 Chapter 6 Problem solving ENWW
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