| 摘要 |
PURPOSE:To constitute an economical connection test line by connecting a mobile station and a ground line at first through the use of an exchange connection standard signal when the lines of an exchange network of an equipment of the ground station in a digital network and sending a measurement test signal after a prescribed time. CONSTITUTION:A line test control circuit 11 is provided a mobile station 1 in order to attain the purpose above in present invention. When a test line between the mobile station 1 and equipments of ground stations 5, 7 is established, the mobile station sends an exchange connection standard PB signal at first and is connected to the equipment of the ground stations 5, 7 and sends a control test signal after a prescribed time. As a result, since the test line is established by using the exchange connection standard PB signal before the transmission of a test signal, it is not required to convert an analog test signal into a digital signal and to convert the signal into the exchange connection standard PB signal, and the test line is established economically. |
