The hub makes possible a fast and economical extension of ethernet network it has eight or sixteen twisted pair ports which can be used for the connection of further main segments or terminals particularly suitable for special automatic protocols like eg the fl net the fl hub 816 tx zf supports both ethernet with 10 mbits and also with 100 mbits the hub regenerates the received data telegrams and sends it to remaining ports a port allocation switch is found for the port 5 on the hub the