A telephone device may selectively communicate via a public telephone network and an IP telephone network. The device may be configured to identify, when a start operation is performed after a preparing operation being performed while the request notice is being executed, whether a destination of the preparing operation is public network destination or an IP network destination. Additionally, the device may identify whether the call request is a public network request or an IP network request. The device may be configured to send a call request to the public network destination when the call preparing operation destination is a public network destination and the call request is identified as an IP network call request. The device may be configured to send a call request to the IP network destination when the destination corresponding to the call preparing operation is identified as a destination in the IP network.