363-206-285
Page 8 of 12 Issue 3, June 2001
DDM-2000 OC-3 MULTIPLEXER
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 such as a FIND-R-SCOPE
*
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.
* Registered trademark of F. J. W. Industries, Inc.
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