Lucent Technologies DDM-2000 OC-3, User & Service Manual

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363-206-285
About This Document
xxxvi Issue 3 June 2001
Safety Precautions for Unenclosed Systems
During service, maintenance, or restoration, a lightwave transmission system is
considered unenclosed. Under these conditions, follow these practices:
1. Only authorized, trained personnel shall be permitted to do service,
maintenance, and restoration. Avoid exposing the eye to emissions from
unterminated, energized optical connectors at close distances. Connectors
associated with lightwave regenerators are recessed, which limits
exposure distance. However, technicians removing or replacing
regenerators should not stare or look directly into the vacant regenerator
slot with optical instruments or magnifying lenses. (Normal eyewear or
indirect viewing instruments are not considered magnifying lenses or
optical instruments.)
2. Only authorized, trained personnel shall use the lightwave test equipment
during installation or servicing since this equipment contains
semiconductor lasers. (Some examples of lightguide test equipment are
OTDR's, Hand-Held Loss Test Sets, and Feature Finders.)
3. Under no circumstances shall any personnel scan a fiber with an optical
test set without verifying that all lightwave sources on the fiber are turned
off.
4. All unauthorized personnel shall be excluded from the immediate area of
lightwave transmission systems during installation and service.
Consult ANSI
*
Z136.1 American National Standard for Safe Use of Lasers for
guidance on the safe use of lasers in the workplace.
Electrostatic Discharge (ESD) Considerations
!
CAUTION:
Industry experience has shown that all integrated circuit packs can be
damaged by static electricity that builds up on work surfaces and personnel.
The static charges are produced by various charging effects of movement
and contact with other objects. Dry air allows greater static charges to
accumulate. Higher potentials are measured in areas with low relative
humidity, but potentials high enough to cause damage can occur anywhere.
* Registered trademark of American Standards Institute, Inc.