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KNX IP Router as a backbone and line coupler
The physical address assigned to the EIB/KNX IP Router determines whether the device
operates as a line or backbone coupler. If the physical address is in the form of x.y.0 (x, y:
1..15), the router operates as a line coupler. If it is in the form of x.0.0 (x: 1..15), the
router acts as a backbone coupler.
Attention:
If the EIB/KNX IP Router is used as a backbone coupler (x.0.0), there must be no
KNX IP Router in the topology beneath it. For example, if a KNX IP Router has the
physical address of 1.0.0, there must be no KNX IP Router with the address 1.1.0.