the field of the invention is that of reconfigurable devices, optical multiplexing type roadm insertion / extraction. the roadm according to the invention is a secure device includes at least one optical input and an optical output (e) of the device (s), including:a first wavelength select switch is used as a multiplexer (wss1).- a second wavelength select switch (wss2) used as a du00e9multiplexeur.- there is a link between the optical input (ci) (e) of the input device for multiplexing first and second wavelength select switch.an optical coupler (cy2) between the outputs of first and second switches for selecting wavelength of the optical output (e) of the portable device.
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