You can get the user guides from Avaya.com for each phone type. In the case of the 44xx series - go to Avaya.com, click on documents (under SUPPORT) - wait for the alphabet bar, click on the M, scoll down to Magix Integrated Communications System, click on "view all documents", use the slide bar to get to the user guides section - then download the 4400 series display telephoen user guide.
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