It is used with the "Personal Directory" feature. If you are getting web error it has not been configured. The Personal Directory, Callers List, and Redial List use a separate central
database, called the IP Phone Application Server, to store directory data and user profile options.
In the Element Manager navigator, click IP Network, Nodes:
Servers, Media Cards.
The Node Configuration window opens. Click the Personal Directories Server Configuration link.
The Personal Directories Server Configuration window opens.
Enter configuration parameters for the IP Phone Application
Server where the Personal Directory, Callers List, and Redial
List database is located.
Hope this helps.