Westermo DDW-221 - Manual (Page 17)

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Factory default
It is possible to set the unit to factory default settings by using two Ethernet cables and
connect to the unit.
To set the unit to factory default do the following:
1. Connect Ethernet cable from port 1 to port 4.
2. Connect Ethernet cable from port 2 to port 3.
3. Power up the unit.
4. Wait for the unit to start up. Control that the PWR led is flashing green.
The PWR flashing indicates that the unit will be set to factory default.
5. Remove the Ethernet cables, the unit will automatically start with factory
default settings.
Note! The Ethernet cables must be removed within 30 seconds from power up
or the unit will do a normal start up.