| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a radio base station including a function for easily checking data transmitting/receiving operation at all times. <P>SOLUTION: The radio base station includes: a maintenance monitoring means which outputs test data; a timer means which starts measuring a fixed time when the test data are output; a transmission line signal switching means which controls transmission/reception of communication data; and a return control means which, when receiving test data, converts the test data into return data and outputs them to the transmission signal switching means. When the maintenance monitoring means outputs the test data and can not receive the return data within the fixed time measured by the timer means, it is detected that abnormality occurs in the transmission line signal switching means. <P>COPYRIGHT: (C)2009,JPO&INPIT |
