This case documents the origins and development of a collaborative interorganizational system. This system is an experimental broadband network being used to trial both ATM technology and new applications such as the transmission, retrieval and archiving of medical images. Director of LARG*net confronts the difficulties of technological innovation and interorganizational management. It provides an illustration of the technical difficulties in integrating different systems, ensuring security, and the ramifications to an organization's own systems when connectivity with other organizations is attempted. It highlights the fact that IT infrastructure is more than just physical hardware. At the same time it raises the issues of handling accountability and responsibility across organizational boundaries.