An electronic device including a cover, a first LED that is installed inside the cover, the first LED emitting light of a first color, a second LED that is installed inside the cover, the second LED emitting light of a second color and a first light guide that guides the light from the first LED and the second LED towards an outside of the cover, the light of the first color and the light of the second color being blended inside the first light guide, wherein the first LED or the second LED and the first light guide are formed as separate and detachable units.

 
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> Wide-sense wavelength division multiplexed (WDM) cross-connect device

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