Telekom Austria AG developed a top-down cost accounting model for the calculation of interconnection fees. In order to complement that model, the regulatory authority worked to create its own network element-based (fixed-link) bottom-up model for the carrier network based on FL-LRAIC. After their completion, the models were compared and in part harmonized.
In order to maximize acceptance among all parties with regard to the premises and output of the bottom-up model, all of the parties interested (in the realization of the model), especially telecommunications operators and telecommunications device manufacturers, were invited to cooperate in designing the model through a consultation procedure.
The regulatory authority's bottom-up reference document of March 2002 is also available as a download.