This multi-featured top of the line model supports advanced system functions. The Dialog 4225 Vision is ideal for demanding and executive office usage. Compared to Dialog 4223, this telephone features 10 extra programmable keys and a large, six-row, graphical display with three navigation keys and four soft-keys. Using the navigation keys in combination with soft-keys, the user can easily access a display menu with a number of system features such as phonebook, call list, diversion, absence reason, etc.