| 摘要 |
PURPOSE: An unmanned security system and a home security service using a media-access-control(MAC) address recognition technique are provided to recognize the MAC address of a domestic digital set-top box and inform emergency situation to other subscribers in an identical cell. CONSTITUTION: A camera takes images with respect to visitors and invaders for each houses and rooms. An Ethernet based multicast dissemination units concentrates the lines of cells in order to group each MAC address terminal unit. Switching units in a building and a house connect the cells. Network facility and device connect the switching units in the building and the house. |
