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Revision: 2010-01-20

Important Safety Precautions

To reduce the risk of fire, bodily injury, and damage to the equipment the follow-

ing precautions must be observed:

 Read and follow all warning notices and instructions marked on the product

or included in the manual.

 Installation of this equipment has to be done by qualified personnel only.

 To achieve safety and satisfactory EMC performance, the plug-in boards

have to be inserted into appropriate subracks. Subrack slots that are not

used must covered with a blanking plate.

 The subracks must be connected to earth. This is achieved by installing the

subracks into properly grounded rack or by connecting the protective ground

terminal provided on some subracks to the earthing network.

 If the subracks are installed in racks then these racks must be connected to

the earthing network according to ETS 300 253.

 Where protective ground terminals are available on the subracks these ter-

minals are marked with the symbol . The following rules must be ob-

served:

The earthing network must be connected to the protective ground termin-

al continuously and securely.

Where the subracks are fitted with an AC power connector the earthing

network must be connected securely to the protective ground terminal

even if the AC power cord is disconnected from the subracks.

The protective grounding may only be disconnected from the subracks af-

ter the DSL line has been disconnected from the plug-in.

 Ground terminals on the tabletop modems are marked with the symbol .

The following rules must be observed:

Use of the ground terminal is optional. If used then the earthing network

must be connected to the ground terminal continuously and securely.

Otherwise the ground terminal can be left open.

The grounding may only be disconnected from the modem after the DSL

line has been disconnected.

 This product is to be used with telecommunications circuits. Take the follow-

ing precautions:

Never install telephone wiring during a lightning storm.

Never install telephone jacks in wet locations unless the jack is specifical-

ly designed for wet locations.

Never touch uninsulated telephone wires or terminals unless the tele-

phone line has been disconnected at the network interface.

Use caution when installing or modifying telephone lines.

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