Centralized topology

A centralized topology includes the following network topologies:

• All Messaging servers are at the same location.

• Messaging supports several locations but all application servers are at one location.

• Messaging supports several locations and the application servers are divided among a small number of locations.

This topology accommodates telephony servers with either uniform or mixed dialing plans.

The following image is an example of a centralized topology in which all Messaging servers are at the same location and the system supports users at a different location.

In this example, the second telephony server in Atlanta uses SIP trunks to connect the Messaging system to the telephony servers in Atlanta and Boston. You can administer SIP trunks as part of a trunk group on the telephony server.