| 摘要 |
<p>A detecting and informing device for access without authorization in cable television system includes a detecting and informing unit for access without authorization. There is a load device between the detecting and informing unit for access without authorization and a user terminal TV. The detecting and informing unit for access without authorization controls the shared voltage thereof in an appropriate voltage range via the load device. If the load device is removed, the detecting and informing unit for access without authorization is directly connected with the user terminal TV or there is an access without authorization, the shared voltage of the detecting and informing unit for access without authorization may be out of the preset voltage range, then the TV signal transmission to the user terminal TV is stopped. If the TV signal transmission needs to be recovered, the load device shall be reconnected, and the system control terminal of the cable TV system shall be reset, hence the cable TV system workers may be effectively acknowledged with the existence of the access without authorization for appropriate handle.</p> |
