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The initial work on an indoor infrastructure for context dependent mobile multimedia communication is presented. The aim is to enable simultaneously research and software development at the infrastructures application and service level, system software level and finally at the basis technology level. The research is carried out in a loosely coupled community of researchers mostly specializing into work at one of the levels. The infrastructure consists initially of an IEEE 802.11b WLAN coverage of a part of the IT University indoor site, a system for indoor geographical routing planning, positioning and tracking of mobile terminals, which have a general speech recognition, synthesis interface. The aim is that the infrastructure makes available Java interface to communication and positioning, and a software repository for the support of development of location based services and the multimedia signal processing functions needed for these. The paper describes the initial experiences on the implementation and application of the infrastructure on a part of the university indoor site of approx. 1200 m2.