An Ideal World

Douglas Ellmore (dellmore@nas.edu)
Mon, 31 Oct 1994 12:22:51 -0500


I am considering using CU-SeeMe in a couple of different projects at
George Mason University and the National Academy of Sciences. I am very
interested in performance characteristics to support CU-SeeMe broadcasts.
Please note that I am using the term broadcast here loosely.

Here are the things I am interested in:

1) Number of "Lurkers" a reflector could support:_____ . If this is
dependent on bandwidth and the server: a) what would be the ideal
recommended configuration, and b) what could one achieve with a host with
a Sparc 1 rating connected to an Ethernet LAN, connected to a T-1
Internet connection, connected to a higher-speed Internet backbone
network. c) Is there any published benchmarks?

2) Receive Only Mode: Assuming there is *no* broadcast audio/video out,
what is the minimum network connection needed for a workstation to
receive one remote broadcast with full audio and good 15 fps+) quality
video?

3) Send and Receive Mode: Assuming there is broadcast audio/video out,
what is the minimum network connection needed for a workstation to send
full audio and good 15 fps+) quality video and receive: a) 1 remote
broadcast of equal quality audio/video and b) each additional connection
up to 8 connections of equal quality.

4) What other network technologies might one want to introduce to support
CU-SeeMe usage growth on an existing LAN with a T-1 connection to the
Internet?

If anyone could help me answer these questions, it would be greatly
appreciated. I may have some follow-up questions releated to
broadcasting from one reflector to another later.

Thanks All,

Doug

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Douglas A. Ellmore, Sr.
Manager, Internet & Multimedia Publishing
National Academy of Sciences, National Research Council
dellmore@nas.edu
Phone: 202-334-3516
URL: http://www.nas.edu/
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