Siemens 6GK5004-2BD00-1AB2 SCALANCE XB004-2 UNMANAGED INDUSTRIAL ETHERNET SWITCH FOR 10/100 MBIT/S; WITH 4 X 10/100 MBIT/S TWISTED PAIR- PORTS WITH RJ45-SOCKETS; 2 X 100 MBIT/S MULTIMODE GLASS FOC-PORT WITH SC-SOCKET; FOR CONSTRUCTION OF SMALL STAR OR LIN