#howto

A step-by-step procedure to reset an Avaya 16XX IP phone.
You simply have to type the following sequence of keys on the faceplate of the phone:
Mute 2 5 3 2 7 # (25327 is the word CLEAR)
CAUTION: This procedure erases all settings, without any possibility of recovering data.
Clear Procedure on Avaya Support page
downloads.avay...
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[@nathadeecha8966]

Don’t work for me Model 1608-I

[@RodrigoXavierRN]

Do not Works on my 1608i either

[@dcardarilli3597]

It depends on fw installed on the phone. Try with mute->CRAFTCLEAR (2723825327#) or mute->CRAFTRESET (2723873738#)