The IP Router 2.1 is a modular installation device (MDRC) and forms the interface between KNX installations and IP networks It can be used as a fast line and area coupler and can utilise the local network (LAN) for fast exchange of telegrams between the lines/areas KNX devices can be programmed via the LAN using ETS 3.0 The device uses the KNXnet/IP protocol from the KNX Association (Routing and Tunnelling) The IP address can be fixed or can be received from a DHCP server The power supply range is from 10 to 30 Vdc