Note) When you have no IP address prepared for maintenance purposes
The system cannot be set to maintenance mode, and therefore will be "Fail".
Reference)
When updating the CommUnit software, the system will switch to maintenance mode,
and the MODEM software will be updated via the HUB.
Communication Control Unit
MODEM
HUB
12-18
12.3 BDE Software Updating Tool
Fail
PC
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