| 摘要 |
A house signalling and intercom system is represented and described which has a controller (1), with at least one floor station (2) and with one door station (3), the controller (1) having a floor station terminal (4), a door station terminal (5), a transformer (6), a rectifier (7), a current sensor (8), an alternating-voltage/direct-voltage switch (89) which can be operated via the current sensor (8), an alternating-voltage terminal (10) and a direct-voltage terminal (11), each floor station (2) having a controller terminal (12), a door station terminal (13), a floor signal generator (14), a door opener key (15) which is constructed as normally-open contact, a floor microphone (18) and a floor loudspeaker (17) and the door opener key (15) being connected, on the one hand, to the controller terminal (12) and, on the other hand, to the door station terminal (13), the door station (3) having a controller terminal (18), one floor station terminal (19) for each floor station (2), one bell key (20) constructed as normally-open contact, a door microphone (21) and a door loudspeaker (22), and each bell key (20) being connected on the one hand, to the controller terminal (18) and, on the other hand, to the associated floor station terminal (19), and because the controller (1) is..., on the one hand, to the controller terminals (12) of all floor stations (2) and, on the other hand, to the controller terminal (18) of the door station (3) and the door station terminals (13) of all... Original abstract incomplete. <IMAGE>
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