25CONVENIENCE FEATURESDO NOT DISTURBUse this feature when you want to block calls to your keyset.• While on-hook, press the DND key or dial 401. The DND key flashes toremind you of this mode.• To cancel DND, press the DND key again or dial 400. The DND lightturns off. You can make calls while in the DND mode.NOTES:1. If the Hot Keypad feature has been turned off, you must first lift the hand-set or press the SPEAKER key.2. If you place your keyset in DND mode and you do not have a DND key,your KEYSET STATUS INDICATOR will flash to indicate DND status.ONE TIME DNDIf you are on a call and you do not wish to be interrupted while on that call,you can press the DND key and place your station in Do Not Disturb. Whenyou hang up at the end of the call, DND will be automatically canceled andyour keyset will be able to receive new calls. This feature requires a DNDkey.MUTEYou can mute the handset transmitter or the microphone during any conver-sation:• Press the MUTE key. It will light red.• To resume speaking, press the MUTE button again. The light turns off.BACKGROUND MUSICWhen a music source is supplied, you may listen to music through thespeaker in your keyset:• While on-hook, press the HOLD button to hear music.• Press the HOLD button again to turn music off.You can set the level of background music by using the VOLUME keys whilelistening to the music. This does not affect the speakerphone level.