LV switch IPPBX3000, User Manual

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LvSwitch IPPBX 3000 Manual
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2.2.2 Cleanliness requirements
When indoor dust falling on the body ,it will cause electrostatic adsorption, making the metal connector
or metal contact bad, not only will affect the life of the equipment, but also easy to cause communication
failure. When indoor relative humidity is low, it is easier to produce this kind of electrostatic adsorption.
Work environment should be dustproof, the concentration of particulates in the air is less than 180 mg
/m³, the printer, copier should be placed away from the router cabinet place, so as not to condense the paper,
toner equipment.
In addition to dust, the room on the air containing salt, acid, sulfide also has strict requirements, because
these harmful gases will accelerate the corrosion of metal and the aging process of some parts.
The limits of other hazardous substances in the machine room are: SO2 less than 0.2mg/m³,H2S less
than 0.006mg/m³,NH3 less than 0.05mg/m³,Cl2 less than 0.01mg/m³.
2.2.3 Anti-static requirements of machine room/ persons
The equipment has taken a variety of measures to prevent static electricity, but if the static electricity in the
environment exceeds a certain tolerance, it is still easy to damage the circuit and even the whole machine, so
in the design of the room environment should also consider the anti-static. Electrostatic induction mainly
comes from two aspects: one is the outdoor high-voltage transmission line, lightning and other external
electric field; Second, the indoor environment, floor materials, machine structure and other internal systems.
Therefore, in order to prevent electrostatic damage, the machine room/personnel should meet the following
anti-static requirements:

When laying the anti-static floor in the machine room, it shall comply with the technical requirements
stipulated by the communication industry. The surface resistance and system resistance are as follows: 1 x
1 x 10
5 Ω to 1* 10 9 Ω .

Machine room wall and ceiling surface should be smooth, reduce dust. Materials and equipment with
anti-static property and good grounding of floor are allowed.

The worktable, chair and terminal in the machine room shall be anti - static. Mesa electrostatic leakage
system resistance and surface resistance are as follows: 1 x 10
5 Ω to 1* 10 9 Ω .

Maintain appropriate temperature and humidity condition

Before entering the communication room with anti-static requirements, please wear anti-static clothes and
anti-static shoes, and do not change clothes directly in the room. Do not touch or plug PCB components or
other components and spare parts without permission or without wearing an anti-static wristband.

The anti-static cover on the frame (or printed circuit board component), with the frame installed in a fixed
position and connected with static ground wire, can be opened.

Spare PCB components and components for maintenance must be stored on the rack or in an anti-static
shielding cabinet/bag.
2.2.4 Anti-magnetic interference requirements
All kinds of interference sources, whether from outside or inside the equipment application system, all affect
the equipment in the way of capacitance coupling, inductance coupling, electromagnetic radiation, common