All conference and meeting rooms are linked via a network of more than 600 single-mode optic fibers and about 100 multimode optic fibers. SC & MC optical patches enable unrestricted rearrangement of circuit configurations. Of the six independent LANs built on Gigabit Ethernet and FDDI networks (three information networks, one control, one audiovisual), the information LAN can be opened to conference participants as required. The result is fast and stable information-sharing over a high-grade conference network.