Executone / Encore CX
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At the Operator’s Phone, dial 299.
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Enter date and time in the following format
YYMMDDHHMM.
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Time will be updated.
Executone / Encore Plus
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At the Operator’s Phone, remove handset from cradle.
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Press FEATURE and dial 0 and then dial time in Military Time format.
Ex.1450
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Press FLASH.