Abstract: A communications network (K) provides the integration of at least two networks with different network architectures, (SNA, DCNA, DECNET). The communications network as such exhibits its own specific network architecture (ICNA) independent of the aforementioned architectures. To the selector system (V) of the network are connected pieces of conversion equipment (CEI, CDI, CSI, CIE, CIS, CID). Pieces of equipment for different network architectures are capable of being linked via the aforementioned pieces of conversion equipment. Connections between equipment belonging to the specific network architecture (ICNA) and a second network architecture are routed via a piece of conversion equipment and connections between equipment belonging to two other network architectures are routed via two pieces of conversion equipment wired in series.