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Multimedia Conferencing in the Etherphone Environment
October 1991 (vol. 24 no. 10)
pp. 69-79

The latest extension of the Etherphone project is described. It creates a powerful conferencing system that lets users control their participation in multiple conferences across multimedia networks. The emphasis is on the software mechanisms that support its new features: first, a Sparcstation facility called Phoenix that extends the Etherphone software architecture to permit more flexible conferencing and to control Sparcstation-based Ethernet audio transmission, and, second, the integration of the Phoenix capabilities with Macaw, the earlier video extensions. Also described is a multicast packet protocol for audio transmission, which reimplements and extends the earlier special-purpose protocols, adding per-channel volume control and full support for the extended conferencing modes.

Herrick M. Vin, Polle T. Zellwegger, Daniel C. Swinehart, P. Venkat Rangan, "Multimedia Conferencing in the Etherphone Environment," Computer, vol. 24, no. 10, pp. 69-79, Oct. 1991, doi:10.1109/2.97253
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