Quidway AR 28 Series Routers Installation Manual.pdf - Index of
Quidway AR 28 Series Routers Installation Manual.pdf - Index of
Quidway AR 28 Series Routers Installation Manual.pdf - Index of
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<strong>Installation</strong> <strong>Manual</strong><strong>Quidway</strong> <strong>AR</strong> <strong>28</strong> <strong>Series</strong> <strong>Routers</strong>Chapter 3 <strong>Installation</strong> Preparation• When observing or removing the uninstalled circuit board, please touch the edge<strong>of</strong> the circuit board, and avoid contacting the devices on it.3.1.4 Requirements on Electromagnetic EnvironmentThe interference sources, no matter where they come from, affect the routers withcapacitance coupling, inductance coupling, radiation <strong>of</strong> electromagnetic wave,common impedance (including the grounding system) or conducting line (power line,signal line and transmission line etc.).So the following should be considered:• Take effective measures to prevent the power system from being interfered withby the power grid system.• Keep the router far away from the radio launcher, radar launcher, andhigh-frequency devices working in high currents.• Use electromagnetic shielding when necessary.3.1.5 Requirements on Preventing LightningAlthough many measures have been taken to protect <strong>AR</strong> <strong>28</strong>-30/<strong>28</strong>-31/<strong>28</strong>-40/<strong>28</strong>-80<strong>Series</strong> from lightning, if the lightning intensity exceeds a certain range, damage to therouter may still happen. To protect the router from lightning better, the following shouldbe considered:• Ensure the PGND wire <strong>of</strong> the chassis is well grounded.• Ensure the ground point <strong>of</strong> the socket <strong>of</strong> AC power supply is well grounded.• To enhance the lightning protection capability <strong>of</strong> the power supply, a lightningarrester could be installed at the input end <strong>of</strong> the power supply.• As for the signal line outdoors to which the interface modules <strong>of</strong> <strong>AR</strong> <strong>28</strong> <strong>Series</strong>routers are connected, such as ISDN line, telephone line, E1/T1 line, etc, a speciallightning arrester should be installed at the input end <strong>of</strong> the signal line to enhancethe lightning protection capability.3.1.6 Requirements on WorkbenchNo matter whether you are to install the router in the cabinet or directly place it on theworkbench, it is necessary to ensure that:• There is spacing reserved at the air inlet and outlet in the router so as to facilitatethe radiation <strong>of</strong> the router cabinet.• The cabinet and workbench have good radiation systems.• The cabinet and workbench are firm enough to support the router and otherinstallation accessories.• The cabinet and workbench are well grounded.3-3
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