The Gira KNX IP router interconnects KNX lines via data networks. For this, it uses the KNXnet/IP standard and in the current software version 4 also the secure communication standard KNXnet/IP Secure. KNX telegrams are now also transmitted in encrypted form between the devices via an IP network. KNXnet/IP Secure allows the authentication and encryption of the telegrams sent out by KNX devices in IP networks. This ensures that KNX tunnelling or routing telegrams cannot be read or tampered with on IP. The KNXnet/IP Secure mechanisms work as an additional safety device which protects all KNXnet/IP data traffic: for example on a shared technical backbone of a building.