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28 IP Media Server (Global Call) Demo Guide — November 2003
Demo Details
5.2 Programming Model
This section describes the IP Media Server (Global Call) demo architecture. It contains the
following topics:
• Module Structure
• EventRouter
• Interfaces
• Classes
5.2.1 Module Structure
The IP Media Server (Global Call) demo uses a modular architecture, in which each technology
(IP, voice, CSP) is wrapped inside a module so that a particular technology can be easily added or
removed.
The system contains two modules:
• IP module that serves as the front end to communicate with the IP network
• Voice module to provide voice service
The system also contains a software component, the EventRouter, to connect the modules. The
basic architecture of the system is illustrated in Figure 2.
pdl_win pdl_win.dsp PDL Visual C project file
pdl_win pdl_win.dsw PDL Visual C project workspace
pdl_win\release psl_win.lib Compiled PDL library
Table 4. PDL Files Used by the IP Media Server (Global Call) Demo (Continued)
Directory File Name Purpose