15 October 1993 ImNet: a fiber optic network with multistar topology for high-speed data transmission
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Proceedings Volume 1975, Local and Metropolitan Area Networks; (1993) https://doi.org/10.1117/12.157002
Event: Video Communications and Fiber Optic Networks, 1993, Berlin, Germany
ImNet is a fiber-optic local area network, which has been developed for high speed image communication in Picture Archiving and Communication Systems (PACS). A comprehensive analysis of image communication requirements in hospitals led to the conclusion that there is a need for networks which are optimized for the transmission of large datafiles. ImNet is optimized for this application in contrast to current-state LANs. ImNet consists of two elements: a link module and a switch module. The point-to-point link module can be up to 4 km by using fiber optic cable. For short distances up to 100 m a cheaper module using shielded twisted pair cable is available. The link module works bi-directionally and handles all protocols up to OSI-Level 3. The data rate per link is up to 140 MBit/s (clock rate 175 MHz). The switch module consists of the control unit and the cross-point-switch array. The array has up to fourteen interfaces for link modules. Up to fourteen data transfers each with a maximal transfer rate of 400 MBit/s can be handled at the same time. Thereby the maximal throughput of a switch module is 5.6 GBit/s. Out of these modules a multi-star network can be built i.e., an arbitrary tree structure of stars. This topology allows multiple transmissions at the same time as long as they do not require identical links. Therefore the overall throughput of ImNet can be a multiple of the datarate per link.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
F. Vossebuerger, F. Vossebuerger, Andreas Keizers, Andreas Keizers, N. Soederman, N. Soederman, Dietrich Meyer-Ebrecht, Dietrich Meyer-Ebrecht, } "ImNet: a fiber optic network with multistar topology for high-speed data transmission", Proc. SPIE 1975, Local and Metropolitan Area Networks, (15 October 1993); doi: 10.1117/12.157002; https://doi.org/10.1117/12.157002

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