The following guide advises how to change the password for a BT Voyager router, this is applicable for the following models: BT Voyager 100 BT Voyager 105 You can access the configuration for your modem using any of the following three options:
Double-click the Voyager 105 ADSL Modem shortcut on your desktop.
Click the Start button, then under All Programs select the Voyager 105 ADSL Modem link.
Double-click the Voyager icon (2 green arrows) in your Windows system tray and select the first menu option, labelled "Connect".
Once you have this dialogue window open, update your password in the password field and click "Dial". Your Voyager modem is now updated.