| 摘要 |
PURPOSE: To prevent the malfunction of a vibrator owing to report information of a radio base station, incoming to others, or speaking of others with respect to the vibrator device which informs a user of the incoming to a slave machine of a digital cordless telephone set in the TDD system by vibration. CONSTITUTION: After a certain reception electric field is detected by a reception part 1, a control part 4 checks the reception electric field level after a certain time (2.5ms) by the timing signal from a synchronizing part 3. Thus, both of up and down radio waves in the TDD system are monitored. The radio wave of a control channel of the radio base station or the radio wave by incoming to or speaking of the others is distinguished from the incoming to user's own machine to prevent the malfunction of the vibrator. |
