Cambium Networks PTP 820 Series User Manual page 785

Chapter 16: Unit Management (CLI)
Performing a Hard (Cold) Reset (CLI)
To initiate a hard (cold) reset on the unit, enter the following command in root view:
root> platform management chassis reset
The following prompt appears:
You are about to reset the shelf
Are you sure? :(yes/no):
. The unit is reset.
Enter yes
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Performing a Hard (Cold) Reset (CLI)