5 Features that must be configured, such as speed dialing and call forwarding, aredescribed in Chapter 5. Feature codes are described in Chapter 4. The VCX User Interface is a web browser-based application that allows you tomanage your user account and IP phone. Most of the options available through thisinterface are also available through the TUI. See Chapter 6 for more information onusing the VCX User Interface.Additional Information SourcesYou may also want to refer to the following documents in the VCX documentation set foradditional information: 3Com VCX 9.0 IP Messaging System User Manual — Provides information aboutthe voicemail system and features available on your IP phone.