37Release NotesAdditional Documentation• When you close a configuration file or exit Design Studio, DesignStudio does not prompt you to save changes made only to User Menu.After working on User Menu, save your changes before you close theconfiguration file or exit Design Studio.• You cannot use a proxy server to connect from Design Studio to theApplication Gateway.Additional DocumentationThe following documents are available:• Application Gateway Network Integration Guide• Application Gateway Quick Start Guide• Application Gateway Hardware Installation Guide• Application Gateway Administration Guide• Guest Services Configuration Guide• Voice Office Application user guides for Nortel Internet Telephones:– Broadcasting to Nortel Internet Telephones from a PC– Using Express Directory– Using Visual Voicemail– Using Zone Paging• Design Studio User Guide• Design Studio Getting Started Guide• Design Studio help, device-specific help, examples, tutorials, and tips(available from the Design Studio window)All documentation is available for downloading from the ApplicationGateway Administration Tool, Administration > Downloads page. Youcan also open context-sensitive Help from each page of the ApplicationGateway Administration Tool.Contacting SupportThe best source of support for Nortel products is the Nortel Support Website:http://www.nortel.com/support