The University of Sheffield
Corporate Information and Computing Services

JANET

Support is provided for the use of video conferencing over JANET and SuperJANET through the JANET Videoconferencing Advisory Service (VCAS). VCAS provides support and advise on videoconferencing systems, equipment and environments and will run consultancy and training services. A switching service is provided which allows multipoint videoconferences through Janet to conferences on the public ISDN network (ISDN 2 or 6) or other networks such as Scottish MANs (Meteropolitan Area Networks).

Studio-based systems used for more formal meetings in higher education will usually use SuperJANET, . The codec, which converts the analogue signal to digital for transmission, used in the SuperJANET system provides a data rate of 2Mbps, which gives a very good quality, full screen video and audio signal. Multiple sites can be linked into a conference, with voice switching being used to switch between sites. SuperJANET is now entering Phase III, in which the backbone (155 Mbits/s) will be provide by Cable and Wireless Communications, with 13 `Backbone Edge Nodes´ linked to it at 155 or 34 Mbits/s. These will then be connected to MANs, providing wide access to the service.

Contact

If you would like to know more about our university IP/ISDN JANET-based facilities or arrange a demonstration please email

videoconferencing@sheffield.ac.uk