3-4 Chapter 3 Things You Should KnowVolume Buttons [t and u]The Volume buttons are used to control the volume levels for the handset,speakerphone, ringing bell and background music. The [u] button decreases thevolume and the [t] button increases the volume.They are also used to move between menus and features on the LCD panel. Pressthe [u] button to move to the previous menu or feature, and the [t] button tomove to the next menu or feature.Redial ButtonThe most recent phone number you dialled is held in memory. Press the Redialbutton to redial the number.Conference ButtonThis button can set up a conference call for up to five people, including you.Transfer ButtonThis has two main functions: Transfers a call at your phone to another extension (and toggles between theother extension and the external caller). Enters programming (MMC) mode.Hold ButtonThe Hold button is used to temporarily put your current call on hold (withouthanging-up) while you do something else, such as dial another number forconsultation.Speaker ButtonThis is used to make a call through the speakerphone rather than the handset. Tochange from the handset to the speakerphone while on a call, press the [Speaker]button and put the handset down.