Topic Last Modified: 2010-07-18
Voice resiliency (also called survivability) refers to the ability of users to continue making and receiving calls in the event a central data center that hosts Microsoft Communications Server 2010 becomes unavailable, either through Wide-Area Network (WAN) failure or other causes. In the event of data center failure, Enterprise Voice users must be able to make and receive calls by connecting to a secondary data centers. In addition, branch office users must be able to make and receive calls in the event they lose their WAN connection to a data center. This section discusses planning for voice resiliency in the event of data center or WAN failure.