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Microsoft® Office Communications Server 2007 Resource Kit by Microsoft OCS Team, Stephanie Lindsey, Rick Kingslan, Mitch Tulloch, Kintan Brahmbhatt, John Clarkson, James O'Neil, Hao Yan, Byron Spurlock, Jochen Kunert, Rui Maximo, Jeremy Buch

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Examining the Technical Details Behind VoIP Scenarios

The components that compose a VoIP topology are illustrated in Figure 10-18. This topology supports the following scenarios: calling and receiving calls outside your organization's network (PSTN), providing external access for users, and receiving voice mail. New server roles come into play when deploying an Enterprise Voice infrastructure. In addition to the basic Office Communications Server home pool, which is either an Office Communications Server 2007 Standard Edition Server or an Enterprise Edition pool, the following server roles are required or recommended.

Enterprise voice topology

Figure 10-18. Enterprise voice ...

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