| 摘要 |
<p>A plurality of elevators are each independently interconnected with a multiplexer/demultiplexer; the multiplexer/demultiplexer is in turn interconnected with a single elevator service panel so that by selection of a particular elevator to be interconnected through the multiplexer/demultiplexer to the service panel, one service panel can serve any of the plurality of elevators, thereby saving space and equipment.</p> |
