Unified Messaging Server Scalability

Scalability, or the capability to increase resources to increase the capacity of a given service. There are 2 types of scalability that can be used to increase the capacity of Unified Messaging servers in your organization: horizontal and vertical. In Exchange 2007 Unified Messaging, when you scale vertically, you add hardware resources to a single Unified Messaging server or multiple Unified Messaging server, such as the following:

-         Adding more hard disc space for message storage

-         Increasing the speed or number of processors

-         Increasing the amount or speed or RAM

-         Increasing the number of network adapters or increasing the number of LAN ports in a single network adapter

 

In Unified Messaging, when you scale horizontally, you install the Unified Messaging server role on new Unified Messaging servers and add more Unified Messaging servers to a dial plan to increase the number of incoming concurrent calls that the system can accept. You also increase the number of IP gateways, this increases the number of ports that are available to be used for incoming call.