To ensure that you are able to use the device safely and without faults, comply with the notes below. Improper use may, for example, cause functional restrictions, destruction of the device or, in a worst case scenario, personal injury. You will find any necessary additional warning notices about using the device in the relevant sections.

Read the instructions for the device and keep them for future reference.

Ensure you comply with the relevant regulations when handling supply voltage and devices attached to the mains.

Connect the device as described in these Instructions. Take note of the technical data on the type plate and in these Instructions.

Only connect the device's connection cables to wall sockets that are designed for that purpose, and that have been properly installed.

Only use original accessories and original replacement parts.

Hire a qualified electrician to lay the cables within the building – including the cable to the door terminal.

Only operate the PBX in closed, dry rooms.

Never cover the device.

Do not expose the device to direct sunlight.

Avoid mechanical loads (e.g. vibrations).

Protect the device from dirt, excessive dust and condensation.

Note the values given for ambient temperature and humidity in the technical data.

Radio interference can be generated by any device that emits electromagnetic signals. This can cause interference from overlapping radio waves from different devices. Medical devices in particular can be affected in their function. Do not use the device in places where the use of radio equipment is prohibited. Follow advice and instructions from authorised persons to switch off radio equipment. If you use medical devices such as a pacemaker, contact the manufacturer of this device and find out about the extent to which it is resistant to external high-frequency energy. If necessary, keep the minimum distance recommended by medical device manufacturers (e.g. 50 cm).

Prevent unauthorised persons from gaining access to the device and its programming.

Do not operate a damaged device.

Do not touch the devices during a thunderstorm.

Do not use the device for life support systems or applications inside nuclear facilities. Before using the product for such applications, it is imperative that you obtain the manufacturer's written approval/declaration in each individual case.

Radio waves can cause fire or explosions under unfavourable circumstances. Do not use the device near explosive atmospheres, flammable gases and blasting sites. This also includes areas where the air contains chemicals or dust particles (e.g. grain or metal). Follow existing instructions for switching off electronic equipment in these environments to avoid interference with the blasting and ignition systems.

Incomplete or incorrect configuration can create a personal hazard e.g. because emergency calls cannot be made.

The configuration of the product is made via an integrated web server whose pages are called via web browser. The user interface of the web server (web interface) is available in German, English and French. The detailed operating instructions (online help) is provided in German and English. If you are not familiar with these languages, and the technical terms that are used, seek support from someone who has the necessary technical and language skills.

Do not open the device. Only the manufacturer is permitted to open the device and repair it.

Take suitable measures for protecting your data and the PBX against misuse.

Never tell anyone the user names, passwords or PINs. This applies to postings in forums and communities, router service logs or recorded network protocols.

Consistently use all available options for assigning passwords and PINs. Do not use passwords and PINs that are easy to guess, such as birthdays or anniversaries.

Use the available permissions (programming authorisation, exchange line authorisations, restricted numbers, etc.).

Regularly check the call data recording of your COMtrexx and, if necessary, the logs of your NAT router for discrepancies.

Additional information about protecting the system from misuse can be found in the internet on the pages of the German Federal Office for Information Security (see www.bsi.bund.de search text: TK-Anlagen).