3Com 6040 Installation Manual

Also see for Router 6040: Supplementary guide Release note Quick reference guide Specifications Datasheet

Contents

3Com 6040 Installation Manual Manual pdf 17 page image

3Com Router 6000 FamilyInstallation ManualChapter 2Preparing for Installation3Com Corporation2-2The equipment room should meet the rigorous limits on salt, acid and sulfide to eliminatecorrosion and premature aging of some parts, as shown in the following table.Table 2-3 Harmful gas limits in the equipment roomGas Max. (mg/m3)SO 2 0.2H 2S 0.006NH 3 0.05Cl2 0.012.1.3 ESD PreventionBy design, the router is ESD preventative; but excessive buildup of static electricity can stilldamage the card circuitry and even the entire device.On the communication network connected to the router, static electricity is primarily introducedfrom the outside electrical fields, such as the outdoor high-voltage power cabling and lightning,and from the inside system, such as indoor environment, floor material and the equipmentframe. To avoid damage, ensure that:z The equipment is well connected to earth.z The equipment room is dust-proof.z Maintain adequate temperature and humidity.z Wear an ESD-preventive wrist strap and clothes when contacting the circuitboard.z Place the removed circuit board upward on the ESD-preventive workbench, orinto a static shielded bag.z Hold the circuit board by its edge when observing or moving it, avoiding directcontact with the elements on it.2.1.4 Electromagnetic CompatibilityAll interference sources, from the outside or from the inside of the router/application system,adversely affect the router in the conduction patterns of capacitance coupling, inductancecoupling, electromagnetic wave radiation, and common impedance (including groundingsystem) coupling. To prevent the interference, do the following:z Take effective measures against interference from the power grid.z Use an earthing system or lightning protection grounding different from that forthe power supply equipment and keep them as far as possible.z Keep the router far away from strong power wireless launchers, radar launchersand high frequency and high-current equipment.z Use electromagnetic shielding when necessary.