Abstract: Method for operating a fieldbus access unit, wherein telegrams transferred via a fieldbus are tapped by the access unit, especially without the access unit participating in a data transmission via the fieldbus, wherein the field device information required for interpretation of tapped telegrams is downloaded from a superordinated unit based on identification data contained in the telegrams.

Abstract: A method for remotely servicing a field device of automation technology located in a first network secured by a first firewall, wherein remote servicing occurs via a servicing device associated with a second network secured by a second firewall comprising the steps of: establishing a first communication connection between the field device and a gateway associated with the first network; establishing a second communication connection; reporting of the first gateway; granting a unique identifier by a broker server for the first communication connection; transmitting the unique identifier to a second gateway associated with the second network; establishing a third communication connection between the second gateway and the broker server using the unique identifier; and establishing a communication connection between the second gateway and the first gateway, wherein: the broker server logically connects the second communication connection and the third communication connection with one another, so that communicat