| 摘要 |
A gateway device includes a communication unit communicating a frame signal conforming to an IuUP (Iu User Plane) protocol with a wireless base station controller connected to a circuit switching network; a determination unit determining whether the frame signal received by the communication unit satisfies a predetermined condition or not; a conversion unit converting information included in the frame signal to information to be set in a call control signal of an IMS (IP Multimedia Subsystem) when the frame signal satisfies the predetermined condition; and a call control signal transmission unit transmitting the call control signal to a communication device in the IMS.
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