LAN TCP/IP interface, additional add-on modules for bus communication for energy meters, multi-meters, and power meters, add-on module for connection to LAN-TCP/IP for energies and powers, V, I, p.f., frequency, bit rate via LAN limited to 100 Mbit/s, HW interface, RJ 45 plug-in connection, TCP/IP SW protocol, suitable for single-phase and three-phase meters