Is Enterprise-Level, Open Standard, Open Source VOIP A Myth?

“Is open, SIP-based telephony achievable for the enterprise?
Lately, I am being told by industry consultants, as well as the
majority of trade press articles and vendor presentations, that it
isn’t–that secure and feature-rich IP-telephony can be achieved
only through the proprietary extensions of the established
telephony vendors, at least for now. But communications
professionals at several major universities are collaborating to
develop these systems, based on open source and open standards, for
production use in their own enterprises. Their progress is
encouraging.

“Today, open source approaches to large production services are
probably most appropriate for organizations that employ qualified
IT staff who are comfortable building and configuring open source
packages, and integrating them with their existing
environment…”

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