3Com Router 3030 - 3 Nstalling the; Router; General Site Requirements; Requirements on Environment

3
INSTALLING THE ROUTER
General Site
Requirements
To ensure the proper working of the routers, and to prolong their service life, the
installation site should meet the requirements described in the following
subsections.
Requirements on
Environment
3000 DSL Family must be used indoors. To ensure the normal operation and
prolong their service life, the following requirements for installation site must be
met.
Requirements on
Temperature/Humidity
Certain requirements on temperature and humidity in the equipment room shall
be met. If the relative humidity is too high, the insulation materials in it will
deteriorate easily or even lead to electric leakage. Sometimes this will result in a
change of the mechanical performance of the materials, and rusting of the metal
components. If the relative humidity is too low, the fastening screw will loosen due
to shrinkage of the isolation spacer. In an environment with a dry climate static
electricity may be produced, putting the CMOS of the router to risk. High
temperature is of the greatest risks, for it will significantly degrade the router’s
reliability, speed up the aging process of the insulating materials, and shorten the
service life of the router. Below are the requirements on the temperature and
humidity for 3000 DSL Family:
Cleanliness
Requirements
Dust undermines the normal operation of 3000 DSL Family. Dust on the
equipment can cause electrostatic adsorption, which degrades the contact
performance of the metal connectors or connection points. This happens more
frequently when the indoor humidity is low, which will not only shorten the
router’s service life, but also cause communication failure.
Below is the recommended specification on dust content and particle diameter in
the equipment room:
Table 1 Humidity requirements in the equipment room
Temperature Relative humidity
0
o
C to 40
o
C 10% to 90%
Table 2 Specifications on dust content in equipment room
Maxim diameter (Ï)m Max. intensity (particles/m
3
)
0.5 1.4 x 10
7
1 7 x 10
5
3 2.4 x 10
5
5 1.3 x 10
5