i2021 ISDN Teleset42MORE key flashes, you can press the key to return to the previousmenu.n MUTEThe MUTE button toggles the microphone - on and off - for thehandset, headset, and speakerphone. A steady light (red) lights thekey when active.n REDIALThis key is handy for calling frequently busy numbers. Press this keyto redial the last (manually dialed, or Speed Dialed) number.n VOLUME / RINGERPress the right side of this key to incrementally raise the volume/ringerintensity. You incrementally lower the volume, or ringer intensity, bypressing on the left side of the volume key. A bar graph displays asthe level increases or decreases. This setting (volume or ringer) issaved until changed again.n HOLDThe HOLD key lets you answer or place a second call without losingthe original connection. This is not the key used when transferring ormaking conference calls – other keys are used.n SPEAKERThe SPEAKER hardkey turns the speakerphone, or the headset if used,On and Off. A steady light (red) lights the key when active.(Speaker Hardkey)The Display Window and MenusThe display window contains information used to configure the Teleset’soptions and features. The liquid crystal display (LCD) also shows theCaller ID information, call timer, current time /date and the menus forphone setup. Throughout this manual you will be prompted to makedecisions and choose features that are displayed in the LCD window.The menu system allows you to program all of the features/options of yourTeleset easily and accurately. The “On-Hook” idle screen is shown below.