A disclosed gateway system comprises a classification component configured to classify a stream of data packets received by the gateway system into a plurality of groups, each of the groups associated with a respective communication port of a payload system, and a frame constructor configured to construct for each of the groups of classified data packets payload-frames comprising data of the classified data packets and target information indicative of at least the respective communication port associated with the classified data packets. The classification component can be configured to classify the received stream of data packets based on destination tags embedded in said the packets. Also disclosed a regenerative communication system comprising a payload system having a receiver configured to receive the respective payload-frames transmitted from the gateway system, and a switching component configured to direct each of the received payload-frames to the respective communication port of the payload system based on the target information contained therein.