| 摘要 |
<p>An optical network includes a first passive optical network optical line terminal, coupled to a first port of a first optical filter arrangement, and a second passive optical network optical line terminal, coupled to a second port of the first optical filter arrangement. An optical coupler is connected between the second passive optical network line terminal and the second port of the first optical filter arrangement. A passive optical distribution node is coupled to a third port of the first optical filter arrangement.</p> |
