| 摘要 |
Surveillance system endpoints communicate with each other to send and receive presence information. The surveillance endpoints may react to the received presence information. For example, if one surveillance camera stops functioning, one or more other cameras can react to the presence information, or lack thereof, sent from the malfunctioning camera. Thus, one or more of the other cameras can cover the area normally covered by the malfunctioning camera. Thus, the surveillance endpoints can automatically react to presence events in a network of surveillance endpoints. |
