What westi said is true however it is presented in a different formt for the Partner version. The help file does not clearly say that the Name Field is used as the dial by name entry but IPO operates in the same fashion so the help file could be clearer.
Name: Default = Blank.
Use this field to enter the extension user's full name. The recommended format is <first name><space><last name>. When set, the Name is used for display by phones and within these menus, otherwise ExtnXXX is shown. Only alphanumeric characters and spaces are supported in this field. Do not use punctuation characters such as #, ?, /, -, _ , ^, > and ,. The entry in this field should not start with a space or number.