MECip connects a KNX TP line to a KNXnet/IP Backbone. Via IP Tunnelling ETS can communicate with the KNX bus. Used as IP Router, MECip connects a KNX TP line to the IP Backbone and enables KNX communication between both KNX media KNX IP and KNX TP. MECip can also be used as IP Programming Interface to establish tunelling connections for bus access of PC and other data input devices. Filtering of group communication and physically adressed telegrams is configurable. Transmission of configuration telegrams from TP subline to IP main line can totally be switched off. Special functions to ease troubleshooting, to accelerate commissioning and to avoid unneccessary telegram traffic are additionally available. MECip-Sec supports the "Secure Commissioning" option. When activated, the configuration communication is encrypted by KNX Data Secure. Especially for system components, this kind of configuration protection is tremendously important. Main task of MECip-Sec is protecting the whole KNX IP line from unwanted access. On activation of the "IP Backbone Security" function -only possible with usage of KNX IP Secure Routers- MECip-Sec encrypts the complete communication on KNX IP by KNX IP Secure.