3Com Router 3016 Installation Manual

Also see for Router 3012: Release note Command reference guide Supplementary guide Manual Release note

3Com Router 3016 Installation Manual Manual pdf 19 page image

2 PREPARING TO INSTALL THE ROUTERSafety Warnings As you prepare to install your router, consider the following safety guidelines:■ Switch off the power supply before connecting the cables.■ Keep the router far away from any heat source.■ To ensure normal heat dissipation, do not stack routers during the installation.■ Do not keep a router in a damp place, and prevent liquid from getting into therouter.■ Make sure that the neutral point of the power is grounded properly, to avoidpersonal injury.■ Make sure that the power is off before plugging or unplugging the interfacecards, modules and cables of the router.■ Before removing the chassis, disconnect all the power cords and externalcables.■ To avoid damage to the router, connect all the cables correctly, and neverconnect telephone cables (including the ISDN lines) to the console or AUX port.■ During the installation, wear the ESD (Electro-Static Discharge) preventive wriststrap and ESD-preventive gloves. See the Static Electricity section in this chapterfor additional information on ESD prevention.■ 3Com recommends that you use an uninterrupted power supply (UPS) withyour router.■ To enhance the anti-lightning-strike capability of the router, install a powerarrester at the front end of the power input, and a special arrester at the inputend of the outdoor cable, such as telephone cable, ISDN line or T1/E1 line.General SiteRequirementsThe environment of the installation site influences the performance and lifetime ofthe router. In addition, if the router operates in inappropriate workingenvironment, its performance will become unreliable. The installation site for yourrouter should meet the following requirements for temperature and humidity,dust, gases, static electricity, and electromagnetic discharge.Temperature andHumidityTo ensure normal operation and to prolong the operational lifetime of the router,the equipment room must maintain adequate temperature and humidity. If theequipment room is damp, it is likely to affect the performance of the insulatingmaterial, which may result in electric leakage and lead to metal erosion.If the equipment room is very dry, the insulating shim will contract, leading toloosening of the fastening screws. In addition, static electricity will be produced,which damages the complementary metal-oxide-semiconductor (CMOS) circuit on