Represents an address (phone number or extension) associated with the line device.

Performs AddTapi.NET initialization/shutdown and manages telephony lines.

Describes audio formats for audio input/output.

Provides information about a call and methods for call flow processing.

Describes the direction of a call.

Represents a method that will perform call flow processing.

Provides data for the CallInfo event.

Represents the method that will handle CallInfo event.

Describes various call information items in the CallInfo event.

Describes the origin of a call.

Describes the reason for a call.

Describes the state of a call.

Provides data for the DeviceSpecific and DeviceSpecificFeature events.

Represents the method that will handle DeviceSpecific and DeviceSpecificFeature events.

Describes an extension identifier used to identify device specific extensions for line devices.

The exception that is thrown when the call is disconnected before application called Disconnect method.

Describes different reasons for a disconnect of a call.

Provides data for the TapiError event.

Represents the method that will handle TapiError event.

Contains the most common Telephony API (TAPI) error numbers.

Provides data for the AddTapi.NET events.

Represents the method that will handle AddTapi.NET events.

The exception that is thrown when Telephony API (TAPI) error occurs.

Represents a telephony line device.

Describes media types (or modes) of a call.

Represents a text-to-speech voice available on the computer.