Demo Description

This chapter provides a brief description of the IP Media (IPML) demonstration program.

The IP Media (IPML) Demo demonstrates how the IP Media Library (IPML) API may be used to build a PSTN-IP gateway when using a proprietary host-based protocol stack, i.e., a protocol stack not supplied with the system release. The demo source code can be used as sample code for those who want to begin developing an application from a working application.

A basic topology is presented in Figure 1.

Figure 1. IP Media (IPML) Topology

Note: This guide does not discuss the proprietary protocol stack design. Review the source code to better understand how the stack is implemented.

The IP Media (IPML) demo supports the following features:

• Configuration file
• Command line options
• Output log files
• Printing to the monitor
• QoS
• Accepts IP calls
• Places IP calls

The following features are not supported by this demo application:

• Analog PSTN interface
• UII message
• NonStdCmd message
• NonStdParm data
• Q.931Facility message

The IP Media (IPML) demo is a cross-OS demo, running under the Windows and Linux environments. Most of the differences in the environments are handled directly by the programming interface and are transparent to the user. Other differences, due to inherent differences in the operating systems, are handled by the Platform Dependency Library (PDL). For more information, refer to the source code in the pdl_win or pdl_linux directories.

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