| 摘要 |
Optical node ( 1 ) comprising at least one input port (PA, PC, PE) and a plurality of output ports (PB, PD, PF), at least one add unit ( 3 B, 3 D, 3 F) for adding at least one signal on an output port (PB, PD, PF), a broadcasting unit ( 8 ) for broadcasting on at least two output ports (PB, PD, PF) the express traffic received on an input port (PA, PC, PE), characterised in that the broadcasting unit ( 8 ) is configured for broadcasting at least one added signal on at least two output ports (PB, PD, PF).
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