Answers to
frequently asked questions

You have questions regarding your telephone? Here you will find answers. Just select your product category (e.g. ISDN phones) and click on the relevant product.


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Is it possible to use Bluetooth and the USB data cable simultaneously?

If Bluetooth is activated and the supplied USB data cable is plugged into the connection socket, Bluetooth is automatically deactivated.

If a Bluetooth voice connection has already been established, Bluetooth is not deactivated until this connection is deactivated.

If a Bluetooth data connection has already been established, the response depends on the receiving device.

Bluetooth is automatically reactivated when the USB data cable is removed.

If Bluetooth is deactivated and the USB data cable is plugged in, Bluetooth cannot be activated.