Internetworking in the BERKOM broadband-ISDN pilot project

The BERKOM test network is a fibre optical network mainly in the western part of Berlin, providing narrowband ISDN interfaces with additional broadband channels up to a capacity of 140Mbit/s. With respect to its geographical size it is a metropolitan area network but the transmission and switching technology of BERKOM is typical for wide area networks. The BERKOM test network is realized by means of two STM switches and one ATM switch, forming a high speed kernel in the 140Mbit/s range. Various local area networks (802.3,802.4, FDDI) with different protocol profiles are interconnected via BERKOM by means of appropriate interworking units.