About This GuideviiConvention DescriptionBlue Text inItalicsUsed for hyperlinks to Yealink resources outside of this documentationsuch as the Yealink documentations (e.g.,For more information, refer toYealink VC400 Video ConferencingSystem User Guide.You also need to know the following writing conventions to distinguish conditional information:Convention Description->Indicates that you need to select an item from a menu. For example,Settings->Basic Settings indicates that you need to select BasicSettings from the Settings menu.TermsAs you read this guide, you’ll notice that the same terms are used repeatedly. Make sure youfamiliarize yourself with these terms.Cloud platform: This term refers to Yealink VC Cloud Management Service (Yealink Cloud),Yealink Meeting Server, Zoom, BlueJeans, Pexip, Mind and Custom platform.Cloud account: This term refers to Yealink Cloud, YMS, BlueJeans, Pexip, Mind and Customaccount.Cloud systems: This term refers to the systems that support Cloud feature, including SIPVP-T49G IP phone, VC desktop and VC110/VC120/VC400/VC500/VC800 video conferencingsystem.Cloud contacts: This term refers to Yealink Cloud contacts and YMS contacts.Summary of ChangesThis section describes the changes to this guide for each release and guide version.Changes for Release 23, Guide Version 23.20The following section is new for this version: Virtual Remote Control on page 165 Public Mode on page 162 Hiding Menu Logo on page 178 Multiple Preset on page 206Major updates have occurred to the following sections: Configuring Video Conference Platform on page 99