| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the malfunction due to a leakage radio wave or the like by testing the communication channel of another base station in a remote place by a test mobile device. SOLUTION: A tester 2 sends channel information (a) for test to a test mobile machine 5 through an exchange 1 and a base station device 4. The tester 2 connects the communication line between the tester 2 and the test mobile machine 5 to exchange 1 through a base station device A3. Thereafter, the tester 2 sends a test signal (b) having a prescribed bit length to this line. The test mobile machine 5 receives the signal by a designated reception channel and internally turns back it and returns it by a transmission channel corresponding to the designated reception channel. The tester 2 compares the received signal with the transmitted test signal to obtain the bit error rate. If this error rate is higher than a prescribed value, abnormality is decided, and turning-back text or the like is performed for each device in the connection path to perform the processing like examination of the fault position or report to a maintenance man. |
