| 摘要 |
PURPOSE:To enlarge a radio callable area by transferring calling information to the radio calling device of other service area through a public data communication network when a calling terminal is moved outside the service area. CONSTITUTION:The title system provides a means to register that one of calling terminals 5-1 to 5-3 is moved from a public telephone network through a service area to other service area and wide area calling transferring devices 6-1 to 6-3 to transfer the calling information through a public data communication network 7 to the radio calling device of the service area of the moving destination when the contents of the registering means are referred the called calling terminal is not present in and the service area of radio calling devices 3-1 to 3-3. Thus, even when the calling terminal is away from the service area of the radio calling device and the radio calling devices 3-1 to 3-3 to make the present position of the terminal into the service area use the same frequency and signal system, the terminal can be called. |
