Before you begin
Before the barge-in tone can be used, a Intrusion tone must be set up on the Tone Generation Customized Tones screen. To verify that a Conference tone is set up, type change tone-generation n, where n is a number between 1 and 50.
Important:
The barge-in tone is a type of intrusion tone. You may have to set up an intrusion tone if the default is silence. If default intrusion tone is not set to silence (as in the United States), you do not have to administer it, but you can change the characteristics of the tone.