| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a communication system enabling a user to recognize the reason of disconnection automatically and immediately, when occurring in the middle of communication due to a line condition failure. <P>SOLUTION: Each of base station 13, 14 includes a radio wave condition supervision section for supervising a radio wave condition; an abnormal condition supervision section for supervising abnormality of the base station; and a message transmitter/receiver for transmitting the abnormality of the radio wave condition and/or the abnormality of the base station as a message, and for relaying the message from each mobile terminal 11, 12. Each of mobile terminals 11, 12 includes a radio wave condition supervision section for supervising a radio wave condition; an abnormal condition supervision section for supervising abnormality of the terminal; a message transmitter/receiver for transmitting the abnormality of the radio wave condition and/or the abnormality of the terminal as a message, and possibly receiving the message from the base station; and an audio processor for outputting by converting the message into audio. <P>COPYRIGHT: (C)2008,JPO&INPIT |
