| 摘要 |
<p>A signalling and/or help request system (1) including a remote transmitter (3) for transmitting an alarm signal; a receiving/conveying device (4) cooperating with the transmitter (3) to receive the alarm signal, the receiving/conveying device being fitted to a lamp (5) of the public lighting system to transmit a message including an identification code onto the electricity supply mains (16); and a receiving unit (20) connected to the electricity supply mains (16) to extract the messages supplied by the receiving/conveying device, and supply them, via a communications network (24), to a centralized receiving device (21) for generating an information and/or help request output signal.</p> |
