3-28 FeaturesD 3 FeaturesDistinctive Dial TonesAn extension user will hear 3 types of dial tone patterns which give information about thefeatures activated on the telephone.Dial Tone 1: This is a normal dial tone. None of the features listed in Dial Tone 2 areactivated.Dial Tone 2: Sent when any of the following features are set.• Absent Message Capability • Background Music (BGM)(for proprietary telephones only)• Call Forwarding • Call Pickup Deny• Data Line Security • Do Not Disturb (DND)• Electronic Extension Lockout • Message Waiting(for proprietary telephones only)• Pickup Dialling • Remote Extension Lock Control(for single line telephones only)• Timed ReminderDial Tone 3: Sent when making an Account Code Entry and answering a TimedReminder call. Also sent when going off-hook with a single line telephonewhich has a message in a Voice Processing System.• Operating Instructions Reference1.7 Useful Features, “Distinctive Dial Tones”+1 s1 s1 sDisplay Contrast Adjustment(KX-T7130 only)Allows a display proprietary telephone user to adjust the display contrast with theCONTRAST selector.• Operating Instructions Reference1.2 Proprietary Telephone Settings, “Display Contrast Adjustment”+