Method for real-time-capable data transmission between two networks (110, 120), wherein a first real-time-capable communication system having a first real-time mechanism for real-time-capable data transmission is set up in a first network, wherein a second real-time-capable communication system having a second real-time mechanism for real-time-capable data transmission is set up in a second network, wherein the first network and the second network as well as the first real-time mechanism and the second real-time mechanism are each different from one another, wherein the first network and the second network are connected to one another via a mapping module which reciprocally maps the first real-time mechanism of the first real-time-capable communication system and the second real-time mechanism of the second real-time-capable communication system to one another, wherein, for real-time-capable data transmission from one of the two networks to the other of the two networks, a data packet is transmitted in one of the two networks according to the real-time mechanism of the real-time-capable communication system set up in said network, the mapping module maps this real-time mechanism to the real-time mechanism of the real-time-capable communication system set up in the other of the two networks, and the data packet is transmitted to the other of the two networks according to the real-time mechanism of the real-time-capable communication system set up in said network, characterized in that the first real-time mechanism and the second real-time mechanism each relate to allocation of data transmission capacities in the form of length and reservation of time slots. wherein a first real-time-capable communication system having a first real-time mechanism for real-time-capable data transmission is set up in a first network, wherein a second real-time-capable communication system having a second real-time mechanism for real-time-capable data transmission is set up in a second network, wherein the first network and the second network as well as the first real-time mechanism and the second real-time mechanism are each different from one another, wherein the first network and the second network are connected to one another via a mapping module which reciprocally maps the first real-time mechanism of the first real-time-capable communication system and the second real-time mechanism of the second real-time-capable communication system to one another, wherein, for real-time-capable data transmission from one of the two networks to the other of the two networks, a data packet is transmitted in one of the two networks according to the real-time mechanism of the real-time-capable communication system set up in said network, the mapping module maps this real-time mechanism to the real-time mechanism of the real-time-capable communication system set up in the other of the two networks, and the data packet is transmitted to the other of the two networks according to the real-time mechanism of the real-time-capable communication system set up in said network, characterized in that the first real-time mechanism and the second real-time mechanism each relate to allocation of data transmission capacities in the form of length and reservation of time slots.