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Preface xxv
Emission of Laser Beam (Invisible)
Caution – The main unit and high-speed optical interconnect cabinet contain
modules that generate invisible laser radiation. Laser beams are generated while the
equipment is operating, even if an optical cable is disconnected or a cover is
removed. Do not look at any light-emitting part directly or through an optical
apparatus (e.g., magnifying glass, microscope).