An electronic device using total internal reflection to guide light from a light source housed within the electronic device to the surface of the device. The electronic device has a cover secured to a protective housing to form a protective enclosure for the electronic device. The cover is adapted to use total internal reflection to guide light through the cover to a plurality of surface portion of the cover. A second surface portion of the cover is adapted to totally internally reflect a first portion of the light to the first surface portion.

 
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> Optical transceiver, connector, substrate unit, optical transmitter, optical receiver, and semiconductor device
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