Abstract: The invention relates to a communication node for a data networks for receiving messages from a physical interface having transmitting and receiving means, by way of which physical interface the communication node is connectable to a communication line of a data network, comprising: a communication module for receiving a message and for creating a corresponding message object referencing message data of the received message and metadata, the communication module being configured to store the message object in a memory and to create a message event upon creating the message object, the message event containing or being associated with a reference to the message object; a tagging and filtering unit configured to retrieve the message object referenced by its message event upon receiving the message event and, if a predefined filter criteria applied to the message object is met, configured to derive a tag and to update the message object in the memory with the determined tag to be a tagged message object; and

Abstract: A communication node for a packet-switched data network is proposed, which comprises an integrated circuit having a system of electronic components for sending and/or receiving audio and/or video data, particularly of an audio and/or video data stream. A media access control component for implementing a media access control and a physical interface with transmitting and receiving means, by way of which the communication node is connectable to a communication line of the data network, are provided as components of the system. The media access control component is connected via an internal first interface to the physical interface for exchanging data. The system comprises a real-time clock synchronization unit for synchronizing time information with other communication nodes of the data network as well as a queue management unit. The real time clock synchronization unit and the queue management unit are fully arranged in the physical interface.