363-206-285
Issue3,June2001 Page5of12
DDM-2000 OC-3 MULTIPLEXER
Safety Instructions
Product Safety Labels
These instructions involve lasers, lightwave optical cable and connectors, and precautions
when handling circuit packs to prevent damage from electrostatic discharge. The
appropriate user/service manual contains admonishments in the form of
DANGERS,
WARNINGS
,and
CAUTIONS
that must be followed at all times.
These admonishments have the following definitions:
â–
DANGER
indicates the presence of a hazard that will cause death or severe
personal injury if the hazard is not avoided.
â–
WARNING
indicates the presence of a hazard that can cause death or severe
personal injury if the hazard is not avoided.
â–
CAUTION
indicates the presence of a hazard that will or can cause minor personal
injury or property damage if the hazard is not avoided. The caution is also used for
property-damage-only accidents. This includes equipment damage, loss of
software, or service interruption.
Lightwave Safety Guidelines
General Laser Information
Lightwave/lightguide systems, their associated test sets, and similar operating systems use
semiconductor laser transmitters that emit light at wavelengths between approximately 800
nanometers and 1600 nanometers. The emitted light is above the red end of the visible
spectrum, which is normally not visible to the human eye. Although radiant energy at near-
infrared wavelengths is officially designated invisible, some people can see the shorter
wavelength energy even at power levels several orders of magnitude below any that have
been shown to cause injury to the eye.
Conventional lasers can produce an intense beam of monochromatic light. The term
monochromaticity means a single wavelength output of pure color that may be visible or
invisible to the eye. A conventional laser produces a small-size beam of light, and because
the beam size is small the power density (also called irradiance) is very high. Consequently,
lasers and laser products are subject to federal and applicable state regulations as well as
international standards for their safe operation.
A conventional laser beam expands very little over distance, or is said to be very well
collimated. Thus, conventional laser irradiance remains relatively constant over distance.
The alert symbol appears throughout these products and the
appropriate user/service manual to alert the user to the presence of
important operating and maintenance (servicing) instructions for the
DDM-2000 Multiplexers.
!
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