The invention relates to a method for operating a transmission system (1) that comprises a first network (2) and at least one additional network (3), in which data are exchanged between said at least two networks (2, 3) by means of data of the first network (2) being fed to duplication means (4) in the form of data packets, these fed data packets being wirelessly transmitted to separator means (5) via at least two transmission paths (6, 7) using PRP, and being forwarded from said separator means (5) to the connected additional network (3) in the form of a data stream. The invention is characterized in that the data packets are temporarily stored in a memory once they have been transmitted via the at least two transmission paths (6, 7).