
C HAPTER
6
Components and Subsystems:
Telephony Services
This chapter examines and discusses Unity’s Media Interface Unit (MIU). Along with the
roles and responsibilities of the MIU, this chapter outlines the MIU architecture.
The MIU integrates Unity into the phone system. That integration involves linking the rest
of Unity to the telephone system by providing call information to other Unity components.
Additionally, integration gives other Unity components control over calls that arrive at
or originate from the voice-mail system, including the capability to answer, transfer, and
disconnect calls that arrive at the voice-mail system. In short, ...