Good question! Because cBarge is essentially an AdHoc Conference, this tone is related to the Conference Join/Leave Tones. To disable the cBarge tone you would have to disable the Conference Join/Leave Tones.
Barge (Conference Barge)
The Barge feature enables phone users to join a call on a shared octo-line directory number by pressing the Cbarge soft key and converting the call to an ad hoc conference. This feature uses a hardware conference bridge configured in Cisco Unified CME. When the initiator barges into a call, an ad hoc conference is created between the barge initiator, the target party, and the other party connected in the call. Parties see the call information on their phone displays and, if the conference join tone is configured, hear a tone.
To enter cp-dualtone configuration mode for specifying a custom call-progress tone, use the dualtone command in custom-cptone voice-class configuration mode. To configure the custom-cptone voice class not to detect a call-progress tone, use the no form of this command.
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The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...