| 摘要 |
PURPOSE:To effectively utilize call incoming service by receiving a terminated call by temporarily canceling resources under use and allocating them for communication with a second communication terminal when a call enabling response is terminated from the second communication terminal during multi-media communication with a first communication terminal. CONSTITUTION:When the call incoming information service under communication in an ISDN is received and a call terminating command is received from a line interface 16, a system control part 14 reports the execution of a mode switching means to 'no voice' to a multiplexing/separating part 15 in the case of using two B channels. Next, the execution of an ability exchange process to switch a transfer rate to one B channel is informed of the separating part 15. Afterwards, the disconnection request command of an added channel under using in multi-media communication is transmitted to the line interface part 16, and an audio signal changeover switch 17 is switched from the separating part 15 to the side of the interface part 16. Then, a terminated call receiving command is transmitted to the interface part 16. |
