| 摘要 |
<p>Intercom set (1), of the type comprising at least one external signal transceiver unit (2), of the type selected among wired units and remotely operated units, which is arranged outside a building (A), and at least one internal signal transceiver unit (3), of the type selected among wired units and remotely operated units, which is arranged inside a respective building unit, apartment (B), which is present in the building (A); at least one internal unit (3) comprising at least one respective control element (4) for sending an alarm signal; the at least one external unit (2) and the at least one internal unit (3) comprising at least one deterrent device (5), which is selected among a loudspeaker and a visual indicator, designed to emit an alarm signal.</p> |
