This is done by shorting the jumper on the securecomm board. This jumper is located next to the 25 pin connector, there is a jumper "JP1".
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Power down the unit and short the pins on "JP1".
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Power up the unit and let it complete its boot sequence. "Led's 1,2,3 in a triangle sequence."
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Power down the unit and remove the jumper and power back up the unit.
The I.P address should be back to (129.2.0.41)