Examining the Technical Details Behind VoIP Scenarios

The components that compose a VoIP topology are illustrated in Figure 11-15. 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 R2 Standard Edition Server or an Enterprise Edition pool, the following server roles are required or recommended.

Enterprise Voice topology. Note that the lines connecting the different server roles represent protocol traffic and do not necessarily represent the number of NICs the server must be configured with.

Figure 11-15. Enterprise ...

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