Presence is the key, say the authors of this presentation on unified communications. The argument is compelling: instead of paying large sums to expand the capacities of our telephone, we should integrate communications with the computer devices we use. This allows not only voice and video, but also conferencing and calendaring. Status indicators - similar to what we see in Skype and other such tools - let callers know when answerers are available and willing to talk. The major challenge, note the author, is at the edges: adapting to the individual configurations of the users, especially those outside the corporate firewall, who may be using a wide range of configurations.
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