Telephone relay device, teleconference server, teleconference system, telephone relay method, audio call relay method, and program

Abstract

A telephone relay device (30) is connected to a teleconference server so as to allow communication therewith, said teleconference server relaying an audio call between communication terminals that are participating in a teleconference via an IP network. The telephone relay device comprises a participation request unit (32), an outgoing call unit (33), and a call relay unit (34). In response to receiving, from the teleconference server, an audio quality reduction notification indicating that the audio quality of the audio call between the communication terminals is less than a specified level, the participation request unit (32) requests permission from the teleconference server to participate in the teleconference. In response to the granting of approval for participation in the teleconference, the outgoing call unit (33) calls telephone terminals associated with the communication terminals. In response to receiving responses to the call from the telephone terminals, the call relay unit (34) relays a teleconference audio call between the telephone terminals and the teleconference server.

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