Selenio™ Network Processor
User Guide
Servicing
© 2019 Imagine Communications Corp.
Proprietary and Confidential.
May 2019 | Page 148
CAUTION!
Only authorized, trained personnel shall be permitted to do service, maintenance, and restoration.
1.
Avoid exposing the eye to emissions from unterminated, energized optical connectors at close
distances.
2.
Ensure that only authorized, trained personnel use optical test equipment during installation or
servicing.
3.
Turn off all laser sources before scanning a fiber with an optical test set.
4.
Keep all unauthorized personnel away from the immediate area of the optical fiber systems during
installation and service.
For guidance on the safe use of optical fiber communication systems in the workplace, consult
ANSI
Z136.2, American National Standard for Safe Use of Lasers
in the U.S. or outside the U.S.,
IEC-60825,
Part 2
.
Label
The SNP is a Class 1 laser product when used with a fiber optic back module.
Figure 8:
Label for Class 1 Laser Products
Inspecting and Cleaning Fiber Optic Connections
When connecting fibers to a back module, ensure that you do not touch the end of the fiber, or allow it
to become dirty. Small amounts of microscopic dust or other contaminants can seriously impair or
disable a fiber optic network. If you touch the end of a fiber prior to connecting it to the back module, or
otherwise allow it to become dirty, you must carefully inspect and clean the connection.
This table lists some typical contaminants of a fiber optic connection.
Table 1:
Typical Contaminants
Contaminant
Comments
Dust particle, 1 micron
Can block up to 1% of the light transmission, creating a loss of 0.05 dB
Dust particle, 9 microns
Although microscopic, the particle can completely block the fiber core
Human hair
Typically 50 to 75 microns in diameter
Oil
Frequently caused by touching
Film residues
Can accumulate from vapors or smoke
Powdery coatings
Can be left behind after water or other solvents evaporate
