| 摘要 |
A telephone conferencing system includes a voice services equipment (VSE) (10) allowing a number of telephone calls to be connected together to form a conferencing function. The initiator of the telephone conference calls is on an incoming line (12) and is asked by the VSE (10) to give the telephone numbers of the desired other participants to the conference. These numbers are then stored in a participant number store (20) and the system dials out to these telephone numbers with an invitation to join the conference by ringing a certain number. When the participants call back on the incoming/outgoing lines (14), their identity is checked, preferably automatically by means of calling line identity signals, with the numbers in the store (20), and only in the event of a match is each participant allowed to join the conference. For additional security, the participants may also need to enter a specific PIN, which may have been read out by the system during the invitation to join the conference. |
