The contributions of John Judge;
Greg McFarlane;
Malcolm Purvis;
Chris Amies;
Ron Barrett;
Tim Docker;
and Brett McDowall of the former OTC R&D Lab are gratefully acknowledged;
as are those of Leith Hayes of OTC Product Development;
Tom Nuendorfer of Carnegie Mellon University’s Information Technology Center;
Telecom Fast Packet Services;
and OTC Marketing and Sales. This work was carried out at OTC Research and Development between 1989 and 1992;
and at the University of Wollongong between 1993 and 1994;
with sponsorship from Australian Telecommunications and Electronics Kesearch Board grant number N031/179;