The different institutes and the hospital of the University of Basel are distributed all over the city. As a result of this geographical handicap (from the view of a network manager), the university network (BSnet) consists of a main backbone among a couple of institutes of natural science, as well as of a lot of "remote"- backbones in the institutes. The whole network was continuously build up since 1986.
TCP/IP is the "Campus protocol" and therefore routed to all sites. DECnet is available only for special groups. AppleTalk is bridged only on the main backbone whereas NetBEUI is used only as a local workgroup protocol.
Among others the interconnection capabilities to the national and European ATM pilots and its interfaces to the most important other communication services represent major advanced properties of the Swiss National Host, allowing to interconnect ATM based applications to all relevent public network services. In addition links to the existing CATV-network of Basel (Balcab) are currently in the planning state.
The core of the system consists of a number of ATM switches from different manufactures, each having a different internal architecture, but compatible external interfaces, thereby allowing high re-configuration flexibility. Around these switches, the project has developed internet working capabilities between ATM and N-ISDN, ATM and Frame Relay and for the transport of ATM cells over existing transmission systems. Apart from serial and parallel cell-based ATM access links at 155 Mbit/s, the Swiss National Host infrastructure is also equipped with STM-1 and 34 Mbit/s PDH interfaces. ATM-satellite interworking has also been demonstrated on several occasions through collaboration with other RACE II projects. Broadband signalling (both ITU-T Q.2931 and also a more-sophisticated proprietary version for demonstrating the finer features of ATM) is already supported.
The Swiss National Host infrastructure may be used as a platform for traffc experiments in areas such as Usage Parameter Control (UPC), Connection Acceptance Control (CAC), bandwidth management and performance assessment (NP vs. QoS) and for the testing of new terminals and pilot applications. A "stand-alone" policing capability, offering 4 interfaces (to TAXI, cell-based ATM, STM-1 and 34Mbit/s PDH) can also be demonstrated.
Examples of equipment which are attached to Swiss National Host infrastructure include terminal adapters for high-quality, low-bit-rate audio signals, advanced multimedia terminals, tale-medicine-, tale-shopping-, tele-presence-, and multimedia conferencing applications, a video-on-demand scenario and some ATM-oriented network management features related to the most efficient apportionment of traffic and detecting and dynamically re-routing around congested links.
The Swiss National Host site has access to one of the most modern telecommunications infrastructures in Europe. N-ISDN, MEGACOM (nx64 kbit/s) and satellite capabilities are easily accessible, and a 34Mbit/s PDH connection is already provided to the European ATM Pilot.
Initiated by the CMC project "communications model communities" a nation wide pilot project launched by the Swiss PTT, the following "Telemedicine" projects have started l 989 and been realized in the past:
Telepathology a tool for remote diagnosis in surgical pathology, with remote control of microscopes via ISDN: a Telepathology system working via ISDN and consisting of modular software and hardware elements. The main element are Apple Macintosh workstations; a software program for the simultaneous transfer of pictures, voice and data; and procedures for image processing and general administration of all information generated. Additionally, the system allows remote control of the macro- and microscope. The transfer rate is currently 128 kbit/s; The system was tested by the regional hospitals in Sarnedan and Burgdorf by offering a remote frozen section services to the remote hospitals.
Teleradiology on ISDN interactive on line diagnosis and medisal consulting:
A Teleradiology system working via ISDN and consisting of modular software and hardware elements. The main element are Apple Macintosh workstations; a software program for the simultaneous transfer of pictures, voice and data; and procedures for image processing and general administration of all information generated. Additionally, the system allows the remote control and image access to remote CT, Cameras or Scanners. The transfer rate is currently 128 kbit/s; the system is currently tested by the Cantonal hospitals in Altdorf and Schwyz by offering a remote diagnostic services to the remote hospitals.
Telelaparoscopy (minimal invasive surgery) in the area of Telesurgery, image transfer on ISDN-N for online diagnostic assistance and consulting.
The first trials have been executed with a similar system mentioned above. The surgeon controls the system by a special pedal equipment which allows to control communication and images (grab frozen images). The system is connected to an in house ISDN-PBX. So it is possible for a pathologist or the gastoenterologist to have a remote "in situ" view in the operation area.
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