| 摘要 |
Disclosed is a Video Alarm Security System (VASS) adapted to transmit image information showing detected alarm events to a communication device of a remote person allowing said person to verify the alarm event before initiating a 3-party call to a PSAP (Public Safety Answering Point) with jurisdiction over the location of said VASS. In one embodiment the 3-party conference call is established using two co-joined and bridged transceivers, A and B, wherein transceiver A is a Wi-Fi transceiver connected to an internet router to establishes an internet video call connection between the VASS and person and B is a cellular telephone transceiver adapted to establishes a bridged call connection between the VASS and PSAP. In another embodiment transceivers A and B are both cellular telephone transceivers. Methods for establishing 3-party PSAP call connections using ISP (Internet service provider) or cellular telephone company provided conference calling services are also disclosed. |
