The invention describes a transmission device having a (TCP/IP) protocol stack (S, S′), which is designed for the transmission of data (D) in a time-sensitive network (TSN). The transmission device comprises at least one TSN-compliant virtual Ethernet interface (2.2, 2.2′) and an associated TSN control unit (3.1, 3.1′). The at least one TSN-compliant virtual Ethernet interface (2.2, 2.2) is designed to send and/or receive a TSN-compliant data stream (2.1, 2.1) in a physical layer (1) of the TCP/IP protocol stack (S, S). The TSN-compliant data stream (2.1, 2.1′) can be configured and/or parameterised by means of the associated TSN control unit (3.1, 3.1′).