| 摘要 |
<p>Telephone terminals provide an initiate conference feature. In response to actuation of a button, as each telephone terminal is dialed, a logical link is set up between an initiating telephone terminal and the dialed telephone terminal. Once all the terminals of the conference call are communicating with the initiating telephone terminal via logical links, the initiating telephone terminal waits until all of the other terminals are idle and then sets up a conference call that has the appropriate bandwidth for the type of conference call requested. Once a logical link has been set up to a telephone terminal, that telephone terminal lights the indicator associated with the initiate conference feature. A telephone terminal whose initiate conference indicator is lit can remove itself from the proposed conference by its own initiate conference button being actuated. Further, if two telephone terminals are engaged in a telephone call and a third telephone terminal is to be added to the call, the user of a first telephone terminal actuates the initiate conference button and dials the third telephone terminal. Once a logical link has been established to this third party, the user of the first telephone terminal rejoins the user of the second telephone terminal in the original telephone call. When the first telephone terminal detects that the third telephone terminal is idle via the logical link, a conference call is established between the three telephone terminals. <IMAGE></p> |
