3Com 3C13701 Installation Manual

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3Com 3C13701 Installation Manual Manual pdf 19 page image

Precautions 19Requirements onPreventing LightningAlthough many measures have been taken to protect 3Com 5000 Routers fromlightning, if the lightning intensity exceeds a certain range, damage to the router maystill happen. To protect the router from lightning better, the following should beconsidered:■ Ensure the PGND wire of the chassis is well grounded.■ Ensure the ground point of the socket of AC power supply is well grounded.■ To enhance the lightning protection capability of the power supply, a lightningarrester could be installed at the input end of the power supply.■ As for the signal line outdoors to which the interface modules of 3Com 5000 Routersare connected (such as an ISDN line, telephone line, E1/T1 line, etc.) a speciallightning arrester should be installed at the input end of the signal line to enhance thelightning protection capability.Requirements onWorkbenchNo 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 facilitate theradiation of 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.Precautions Routers play a key role in data communications network. Please pay attention to thefollowing:WARNING: It indicates that this operation is incorrect and may seriously damage therouter or endanger the operator. Please follow the correct operation procedures for sakeof safety.CAUTION: It indicates that during the installation and usage of the router, the operationneeds attention. This operation is incorrect and may affect the normal operation of therouter.Please follow the following safety recommendations during the installation and use ofthe router:■ Keep the router away from any wet place or heat source.■ Make sure that the router is normally grounded.■ Please wear an ESD-preventive wrist strap before installation, and make sure one endof it well contacts your skin, and the other end is well grounded.■ Do not hot swap the interface modules of the router and any cable.■ Correctly connect the interface cable for the router. Do not connect the telephonecable (including the ISDN cable) to the AUX port or the console port.■ Always use Uninterrupted Power Supply (UPS).