3Com 3C13701 Installation Guide - Page 19

Requirements on Preventing Lightning, Requirements on Workbench, Precautions, Requirements

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Precautions 19 Requirements on Preventing Lightning Although many measures have been taken to protect 3Com 5000 Routers from lightning, if the lightning intensity exceeds a certain range, damage to the router may still happen. To protect the router from lightning better, the following should be considered: ■ 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 lightning arrester 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 Routers are connected (such as an ISDN line, telephone line, E1/T1 line, etc.) a special lightning arrester should be installed at the input end of the signal line to enhance the lightning protection capability. Requirements on Workbench No matter whether you are to install the router in the cabinet or directly place it on the workbench, it is necessary to ensure that: ■ There is spacing reserved at the air inlet and outlet in the router so as to facilitate the radiation of the router cabinet. ■ The cabinet and workbench have good radiation systems. ■ The cabinet and workbench are firm enough to support the router and other installation accessories. ■ The cabinet and workbench are well grounded. Precautions Routers play a key role in data communications network. Please pay attention to the following: WARNING: It indicates that this operation is incorrect and may seriously damage the router or endanger the operator. Please follow the correct operation procedures for sake of safety. CAUTION: It indicates that during the installation and usage of the router, the operation needs attention. This operation is incorrect and may affect the normal operation of the router. Please follow the following safety recommendations during the installation and use of the 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 end of 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 telephone cable (including the ISDN cable) to the AUX port or the console port. ■ Always use Uninterrupted Power Supply (UPS).

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Precautions
19
Requirements on
Preventing Lightning
Although many measures have been taken to protect 3Com 5000 Routers from
lightning, if the lightning intensity exceeds a certain range, damage to the router may
still happen. To protect the router from lightning better, the following should be
considered:
■
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 lightning
arrester 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 Routers
are connected (such as an ISDN line, telephone line, E1/T1 line, etc.) a special
lightning arrester should be installed at the input end of the signal line to enhance the
lightning protection capability.
Requirements on
Workbench
No matter whether you are to install the router in the cabinet or directly place it on the
workbench, it is necessary to ensure that:
■
There is spacing reserved at the air inlet and outlet in the router so as to facilitate the
radiation of the router cabinet.
■
The cabinet and workbench have good radiation systems.
■
The cabinet and workbench are firm enough to support the router and other
installation accessories.
■
The cabinet and workbench are well grounded.
Precautions
Routers play a key role in data communications network. Please pay attention to the
following:
WARNING:
It indicates that this operation is incorrect and may seriously damage the
router or endanger the operator. Please follow the correct operation procedures for sake
of safety.
CAUTION:
It indicates that during the installation and usage of the router, the operation
needs attention. This operation is incorrect and may affect the normal operation of the
router.
Please follow the following safety recommendations during the installation and use of
the 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 end
of 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 telephone
cable (including the ISDN cable) to the AUX port or the console port.
■
Always use Uninterrupted Power Supply (UPS).