CAUTION   Danger of injury    •   When working on an open communication system or device, make sure that it is never left unattended.  •   Risk of injury resulting from heavy items or loads. Lifting heavy objects/loads can cause injury. Use appropriate aids to carry out such tasks.  •   Risk of injury resulting from laser radiation. If there are any optical interfaces: In case of laser radiation, do not look directly into the beam. You could damage your eyes.

CAUTION   Risk of explosion if accumulators and batteries are not changed properly    •   Only use licensed battery packs and batteries.  •   The lithium battery must be replaced only by an identical battery or one recommended by the manufacturer.

CAUTION   Risk of fire    •   Only telecommunications cables with a cable diameter of at least 0.4 mm (AWG 26) may be used.  •   The system cabinets must not be fitted with any third-party devices that have not been approved.  •   Do not store any documents or similar flammable items in the system.

CAUTION   General risk of injury/accidents in the workplace    •   When maintenance work has been completed, always re-install all safety equipment in the right place. Also close all doors, covers, or the housing after completing test and maintenance work.  •   Install cables in such a way that they do not pose a risk of accident (tripping), and cannot be damaged.  •   Make sure that the work area is well lit and tidy.  •   When working on the systems, never wear loose clothing and always tie back long hair.  •   Do not wear jewelry, metal watchbands or clothes with metal ornaments or rivets. These could cause injury or short circuits.  •   Always wear the necessary eye protection whenever appropriate.  •   Always wear a hard hat where there is a risk of injury from falling objects.  •   Check your tools regularly. Only use intact tools.