Patent ID: 8553066

Claim:
A conference control device that controls teleconferencing among a plurality of conference terminal devices, the conference control device comprising: a data transmission portion that transmits conferencing data that have been transmitted from one of the plurality of conference terminal devices to another of the plurality of conference terminal devices, the conferencing data including at least one of audio data and video data; a first notification request portion that, in a case where a first request packet has been received from the one of the conference terminal devices while the conferencing data that have been transmitted from the one of the conference terminal devices are being transmitted to the other of the conference terminal devices by the data transmission portion, transmits a first notification request packet to the other of the conference terminal devices, the first request packet requesting establishing of a first communication path between the one of the conference terminal devices and the other of the conference terminal devices, the first notification request packet requesting notification of a port number for establishing the first communication path; and a first request response portion that, in a case where a first response packet has been received from the other of the conference terminal devices, transmits a first request response packet to the one of the conference terminal devices, the first response packet providing the notification of the port number for establishing the first communication path, the first request response packet containing information on a transmission source port number of the first response packet.