H3C SecPath M9006, Руководство пользователя

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Keep the gateway far away from radio transmitting stations, radar stations, and high-frequency
devices to make sure the EMI levels do not exceed the compliant range.
•
Use electromagnetic shielding, for example, shielded interface cables, when necessary.
Grounding
Using a good grounding system to protect your gateway against lightning shocks, interferences, and
ESD is essential to the operating reliability of your gateway.
Make sure the resistance between the chassis and the ground is less than 1 ohm. For more
information about grounding the gateway, see "Grounding the gateway."
Power
Perform the following tasks to meet the power requirements:
1.
Calculate the system power consumption.
The system power consumption varies by card type and density. For more information about
system power consumption calculation, see "
Appendix A Chassis views and technical
specifications ."
2.
Select power modules and identify the number of power modules.
The total maximum output power of all power modules must be higher than the system power
consumption. For more information about available power modules, see "
Appendix B FRUs
and compatibility matrixes ."
3.
Verify that the power system at the installation site meets the requirements of the power
modules, including the input method and rated input voltage.
Cooling
Plan the installation site for adequate ventilation.
•
The installation site has a good cooling system.
•
The rack for the gateway has a good cooling system.
•
Leave a minimum clearance of 10 cm (3.94 in) around the inlet and outlet air vents.
Figure 1 shows the airflow through the M9010 or M9010-GM chassis. Figure 2 shows the airflow
through the M9006 chassis. M9014 and M9006 have the same airflow designs.