2.1.1. Host Application

The host application manages and monitors the IP telephony system operations. Typically the application performs the following tasks:

• Initializes Global Call
• Opens and closes IP line devices
• Opens and closes IP Media devices
• Opens and closes PSTN devices
• Configures IP Media and network devices (capability list, operation mode, etc.)
• Performs call control, including making calls, accepting calls, answering calls, dropping calls, releasing calls and processing call state events.
• Queries call and device information.
• Handles PSTN alarms and errors.

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