| 摘要 |
A method of providing conference call connections includes initiating a conference call between multiple conferees using a conferencing controller, placing each of the multiple conferees in a half-duplex listen only mode using the conferencing controller, and receiving a signal at the conferencing controller from at least one of the multiple conferees to actively participate in the conference call. Active participation can be in the form of asking questions, giving comments, or providing a keypress to vote or provide other information. The conference call can also be broadcast to increase participants. Also, after the conference call is initiated, additional potential conferees can be added.
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