Recently VoIP technology has become more familiar, and it continues to expand in potential by working with other IP Communication services and technologies, as the number of applications increases. VoIP technology is moving from the phase of cost cutting by integrating voice and data to the phase of improving productivity by linking with Web applications. Companies now need to achieve “integrated IP Communication,” and there are growing needs for IP Communication services related to this, including VoIP. At this venue, we will introduce methods of dramatically improving business efficiency and reducing communications costs by using IP solutions in a comprehensive manner.