Installation Manual
H3C VG 10-40/10-41 Voice Gateway
Chapter 2 Installation Preparation
2-2
process of the insulation materials, greatly lower the reliability of the
VG, and hence significantly shorten its service life.
The following table lists the requirements of the VG in
temperature and humidity.
Table 2-1
Temperature/Humidity requirements in the equipment
room
Temperature
Relative humidity
0
°
C to 40
°
C (32
°
F to 104
°
F)
5% to 85%
2.1.2 Cleanliness Requirements
Dust is a hazard to the operating safety of the VG. The indoor
dust accumulated on the chassis can cause electrostatic adsorption,
resulting in the poor contact of connectors or metal contact points.
This is more likely to happen when the relative indoor humidity is low,
which will not only shorten the service life of the VG, but also cause
communication failure.
The required specifications on dust content and particle diameter
in an equipment room are shown in the following table.
Table 2-2
Required dust content specifications in an equipment
room
Maximum diameter (
μ
m)
0.5
1
3
5
Max. concentration
(granules per cubic meter)
1.4 x 10
7
7 x 10
5
2.4 x
10
5
1.3 x
10
5
