former employee knew all info about passwords and set up the system we need to reset the system our phone model is dkt3020-sd. we have tried the default password of 999. we need the main default password to reset voicemail for new employees.

the dkt telephone you referened works on several telephone systems .
want is the model of your system ,brain or control unit and which voicemail system are you using

You won't get password information on the open forum........

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Toshiba Technical Support at: fingerlakestelecom.net