| 摘要 |
PROBLEM TO BE SOLVED: To perform call origination from a voice call exchange in a prescribed region to a communication terminal connected via data communication without imposing restriction on utilization modes of the communication terminal.SOLUTION: A voice call control system coordinates a private line C, VPN communication B, and a client terminal 4. The voice call control system obtains a voice call request including terminal identification information to identify the client terminal 4 in the VPN communication, transmits a signal to instruct the VPN communication B to connect with an IP address associated with the terminal identification information included in the voice call request on the basis of an association table in which the IP address to identify the client terminal 4 on an Internet line A is associated with the terminal identification information and stored, and connects the request source of the voice call request with the client terminal 4 connected with the VPN communication B via the VPN communication B for voice call. |
