Our product is a device that interworks with various kinds of analog radio, digital radio, PSTN, smartphone, and speaker on the gateway. The reason why such a product does need is to need for smooth communication among police, military, firefighting, disaster relief, and government offices gathered for collaboration when a crisis occurs in the nation. Recently, disasters such as earthquakes, fire, floods, and terrorism have been occurring with frequency all over the world. so, cooperation between firefighting, police, military, and government for disaster relief is more urgent.