
322 Chapter 10: Typical Configurations and Deployment Models
Figure 10-7 Unity with a Severed WAN Link
Exchange 5.5 Sites Where Unity Is Deployable
A single Exchange 5.5 site in a campus environment, even where a high-speed backbone
connects a metropolitan area, is suitable for a single Unity server to service. A campus
environment typically has more resiliency and therefore most single points of failure are
eliminated. As shown in Figure 10-8, the single-site campus, while seemingly complex, can
easily support a Unity deployment that is both sustainable and manageable.
When multiple Exchange 5.5 sites exist, there needs to be at least one Unity ...