Changing the password you use on your phone is a simple process.
First, login to your Gradwell control panel. From the left hand menu, click Extensions (underneath the Configure menu).
Your VoIP extension will be shown. Click on it and look for the SIP Configuration section. Click on the Reset password button.
The page will reload and your new password displayed. This needs to be entered into your VoIP phone or softphone without spaces. If you highlight and copy the text to your clipboard then the spaces will automatically be removed for you.