Call control device, relay device, call control method, and storage medium

摘要

A call control device, which controls call connections between a plurality of terminals, includes a device information storage unit that stores device information on call-connectable terminals; a call request accepting unit that accepts a call request from one terminal to another terminal; a determining unit that determines, when the call request accepting unit accepts a call request, whether the device information on the other terminal is stored in the device information storage unit; a holding unit that holds a call state of the one terminal when the determining unit determines that device information on the other terminal is not stored in the device information storage unit; a state acquiring unit that acquires state information indicating a state of the other terminal; and a holding tone setting unit that sets a holding tone to be transmitted to the one terminal associated with the state information acquired by the state acquiring unit.