
Planning a Unity Installation 497
So, the areas you want to check regardless of whether or not you use a holistic approach or
a scientific approach are:
• Response time between the Exchange servers and Outlook clients (or between Unity
and Exchange if you are in a simulation).
• Bottlenecks including memory, CPU, and hard-drive, read and write times.
• Storage space (see trending).
In general, message size is easily considered to be an issue. Unity can support a couple of
different voice coders/decoders (CODECS). The two most prevalent CODECS are G.711
or G.729a. Each of these CODECS are used to encode and decode your voice messages,
greetings, ...