20CHAPTER 2: INSTALLING THE ROUTER
■During the installation, wear an ESD
3Com recommends that you use an uninterrupted power supply (UPS) with your router.
General Site The environment of the installation site influences the performance and lifetime of Requirements the router. The installation site for your router should meet the following
requirements for temperature and humidity, dust, gases, static electricity, and electromagnetic discharge.
Temperature and Humidity
To ensure normal operation and to prolong the operational lifetime of the router, the temperature and humidity of the equipment room must be within controlled limits. The requirements for the temperature and humidity of the router installation site are listed in Table 22.
Table 22 Temperature and Humidity Requirements
Temperature | Relative humidity |
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00 to 400C (320 to 1040F) | 5% to 85% |
Dust
Dust is harmful to the safe operation of the router. The specifications for the dust content and diameter of the granule within the equipment room are listed in Table 23.
Table 23 Specification for Dust Content
Maximum diameter (µ m) | 0.5 | 1 | 3 | 5 |
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Maximum density (the number | 1.4 x 107 | 7 x 105 | 2.4 x 105 | 1.3 x 105 |
of granules per cubic meter) |
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Gases
The equipment room of the router must meet strict requirements for the content of salt, acid and sulfide. The specific limitation values of these harmful gases are given in Table 24.
Table 24 Harmful Gas Limitation Values in Equipment Room
Gas | Average (mg/m3) | Maximum (mg/m3) |
SO2 | 0.2 | 1.5 |
H2S | 0.0 | 0.03 |
NO2 | 0.04 | 0.15 |
NH3 | 0.05 | 0.15 |
Cl2 | 0.01 | 0.3 |
Static Electricity
To prevent damage caused by the static electricity, insure that:
■The equipment is grounded
