in similar applications. Customers with dual Cray computers measured the connections between Cray processors over the UltraNet that exceeded 80 MB/s effective transfer rates. Ultra Network Technologies products included network cards for workstations and mini-supercomputers using VMEbus connectors and fiber optic cable for the network physical connections, host network cards which resided in the network hub for Cray Supercomputers, IBM mainframes, mini-supercomputers from Convex Computer, HIPPI standard channel, and others. There were two sizes of high speed network hubs that contained the mainframe host cards plus the fiber optic network hub to network hub cards. The network topology was in the form of connected hubs. Engineers at the Stuttgart University computer center demonstrated long distance connections using German PTT provided fiber optics of effective transfer rates over 4 MB/s up to an 800 km distance. Later products incorporated TCP/IP network protocols in their processors. A typical network configuration of several workstations and a single mainframe host could cost $250,000. A configuration with many workstations and two or three mainframe computers could reach $1 Million. The company grew to about 140 employees at its high point. Its headquarters was located at 101 Daggett Drive, San Jose, CA with other offices in Dallas, Los Angeles, Seattle, Washington DC, Düsseldorf, Germany, and Paris, France. In 1992, the company was abandoned by its investors and sold due to an inability to become profitable and the advent of less expensive network technologies, mainly created by the advent of the higher speed personal computers and lower cost workstations used in the scientific labs; the buyer was Computer Network Technology Corporation of Plymouth, Minnesota (NASDAQ: CMNT). The company's Chairman of the Board was M. Kenneth Oshman, formally chairman of ROLM Corporation, and President was Stan Tenold, previously the president of ROLM's Military Products division. The company's various customers included many high-end computer centers, including, several NASA sites, NSA, US Air Force, US Navy, Aramco, France's EDF, Pittsburg Supercomputer Center, University of Stuttgart, Leibniz University Hannover, Apple Computer, Houston Chronicle, and many other such high end computer users. Citations Defunct networking companies