This specification defines the integration of KNX protocol implementations on top of Internet Protocol (IP) networks, called KNXnet/IP. It describes a standard protocol for KNX devices connected to an IP network, called KNXnet/IP devices. The IP network acts as a fast (compared to KNX transmission speed) backbone in KNX installations. • Widespread deployment of data networks using the Internet Protocol (IP) presents an opportunity to expand building control communication beyond the local KNX control bus providing:
-- Remote configuration
-- Remote operation (including control and annunciation)
-- Fast interface from LAN to KNX and vice versa
-- WAN connection between KNX systems (where an installed KNX system is at least one line)
• A KNXnet/IP system contains at least these elements:
-- one EIB line with up to 64 (255) EIB devices OR one KNX segment (KNX-TP1, KNX-TP0, KNX-RF, KNX-PL110, KNX-PL132),
-- a KNX-to-IP network connection device (called KNXnet/IP server), and typically additional
-- software for remote functions residing on e.g. a workstation (may be iETS, data base application, BACnet Building Management System, browser, ...). Figure 1 shows a typical scenario where a KNXnet/IP client (e.g. running ETS) accesses multiple KNX installed systems or KNX subnetworks via an IP network. The KNXnet/IP client may access one or more KNXnet/IP servers at a time. For subnetwork routing server-to-server communication is possible.