The following conventions are used in this manual.

Notes provide additional useful information.

Cautions signify information that could prevent service interruption.

Warnings provide information that could prevent damage to the equipment or endangerment to human life.

Important Safety Instructions

When using your telephone equipment, please follow these basic safety precau- tions to reduce the risk of fire, electrical shock, or personal injury:

1.Do not use this product near water, such as near a bathtub, wash bowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool.

2.Avoid using a telephone (other than a cordless-type) during an electrical storm. There is a remote risk of shock from lightning.

3.Do not use the telephone to report a gas leak in the vicinity of the leak.

4.Use only the power cord, power supply, and/or batteries indicated in the manual. Do not dispose of batteries in a fire. They may explode. Check with local codes for special disposal instructions.

Save These Important Safety Instructions

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ADTRAN TDU 120e user manual Save These Important Safety Instructions