| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a master device of a communication system capable of performing optimum conference communication between terminals connected to a packet network. <P>SOLUTION: In the master device BT, when IP terminals T1, T2 and T3 are conference-connected to a conference circuit C1, the transmission time of communication packets among the IP terminals T1, T2 and T3 is calculated for the respective conference circuits C1 and C2. Then, the optimum conference circuit C2 is selected and specified on the basis of the calculated result, conference circuit information including the conference ID of the conference circuit C2 is reported to the IP terminals T1, T2 and T3, and the IP terminals T1, T2 and T3 are switched from the conference circuit C1 to the conference circuit C2 and connected. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
