| 摘要 |
<p>A WDM add/drop module for use in a network node of an optical network, comprising an optical drop unit for dropping a first wavelength signal, a trunk receiver unit for converting the first wavelength signal into a first electrical signal, a tributary optical transmitter unit for converting an electrical input signal into a first optical signal, wherein the output of the trunk receiver unit is connected to the tributary optical transmitter unit and to a first interface port of the WDM drop module, an electrical switch unit that, either the first electrical signal or a second electrical signal is through connected to the tributary transmitter unit, a tributary optical receiver unit for converting a second optical signal into a third electrical signal, a trunk transmitter unit for converting an electrical input signal into a second wavelength signal, an optical add unit for adding the second wavelength signal, a switch unit that, either the third electrical signal or a fourth electrical signal is through connected to the trunk transmitter unit, and wherein the output of the tributary receiver unit is connected to the trunk transmitter and/or to a fourth interface port of the WDM add/drop module for interfacing with another WDM add/drop unit. <IMAGE></p> |
