The Headset Interface API supports the development of headset applications that integrate with Avaya Communicator for Windows Release 2.1 or later, Avaya one-X® Communicator for Windows and the Avaya Aura® Contact Center Release 6.3 or later Agent Desktop deployed in embedded softphone mode. Headset applications enable operations such as make call, answer call and hold call to be performed using controls on third-party headsets. Headset applications can control any type of headset, including Bluetooth® and USB. The Headset Interface is a COM component that exposes the following API methods to Headset applications:

• Register: enables a Headset application to register with a softphone client.
• Unregister
• BlacklistEvent: enables a Headset application to specify a list of call control-related events of which it does not wish to be notified. Unless blacklisted, the following events are notified by a softphone client: IncomingSessionEvent; IncomingSessionEventEx; SessionCreatedEvent; SessionEndedEvent; SessionCreatedEventEx; SessionUpdatedEvent; EstablishedEvent; HeldEvent; UnheldEvent; MuteStateEvent.
• MakeCall
• HangupCall
• AnswerCall
• IgnoreCall
• HoldCall
• UnholdCall
• MuteCall
• UnmuteCall

For detailed information about the Headset Interface APIs and events, and on handling multiple call scenarios, see:

• Avaya one-X Communicator Headset Integration Guide, Issue 2.2, April 2015 (152 KB .pdf)