| 摘要 |
PURPOSE:To give warning of sounds and light to quickly restore a system even in the case of the occurrence of communication interception due to shadowing or the like by incorporating a carrier detection circuit, a timer circuit, an interception error discriminating circuit and an alarm circuit in a radio mobile terminal station. CONSTITUTION:The presence or the absence of an idle carrier is judged for the purpose of detecting the communication interception, and the occurrence of communication interception error is discriminated by the use of a timer (for example, 5 seconds) to give a warning with a voice. That is, the presence or the absence of an idle carrier is discriminated in a carrier detection circuit 42 by the command from a data link layer logic circuit 41 which conducts the whole of the system. In the case of the absence, a timer circuit 43 detects a prescribed time (for example, 5 seconds), and an interception error detection circuit 44 discriminates whether communication interception error occurs or not after the prescribed time, and a voice transmission receives the discrimination result to give a warning with a voice. Thus, the occurrence of communication interception error in the line monitor process is reported to a nearby person or the like to promote the restoration. |
