When the web interface is opened for the first time upon initialization, you will see the Security page.

The phone's web-interface (P820)(to be checked)

You must set administrator and HTTP passwords to protect your phone. The default administrator password is 0000 (4 zeros); there is no default HTTP password.

Please note:

• Administrator password. If you do not replace the default administrator password by an individual one, an unauthorized third party with access to the phone could set an administrator password unknown to you. In such a case, you would no longer be able to switch from user mode to administrator mode.
  
  
• HTTP user name and password. If you do not set these, you make it easier for experienced hackers to break into your system.
  
  Be sure to write down your admin password and your HTTP user name and password and store them in a secure place.
  
  Without the administrator password, you will not be able to return the phone and the web interface from user mode to administrator mode; many settings will be inaccessible. Without HTTP user name and password you cannot open the phone's web interface.

You can set and change the data on the phone’s web interface at any time.