communicions processor CP 443-1 for connection of SIMIC S7-400 to industrial Ethernet over ISO, TCP/IP and UDP, S7 communicion, fetch/write, SEND/RECEIVE with and without RFC1006 multicast, PROFINET IO controller, DHCP, SNMP V2, web, diagnostics, initializion via LAN, access protection via IP access list integred real-time switch ERTEC 400, 2xRJ45 connection for LAN with 10/100 Mbit/s