simatic net, cp 343-1 lean communication processor for connecting simatic s7-300 to ind. ethernet via tcp/ip and udp, multicast, send/receive w/ and w/o rfc1006, fetch/ write, s7-communication(server) profinet io-device integrated 2-port switch ertec 200, bg exchange w/o pg, snmp diagnostics, initialization via lan, 2 x rj45 connection for lan with 10/100 mbit/s