The following activities are used in the OpenCTI implementation class to manage events:

SubscribeForEvents activity

The SubscribeForEvents activity is called to send a request to start an event subscription for a device when a user tries to monitor an extension.

UnSubscribeForEvents activity

This activity is called to send the request to stop event subscription for a device when a CSR logs out.

1. In the header of Dev Studio, search for the SubscribeForEvents activity in the OpenCTI adapter class.
2. Copy the activity into the implementation class and add the Pega Platform version 8.7 integration connector to subscribe to the event for a device.
3. On the Activity page, add the properties that are required for your adapter to subscribe to events for devices.
   The following table shows the properties of the SubscribeForEvents activity:

   Properties of the SubscribeForEvents activity

   Property Name	Property Name
   DN	The device number on which the event is subscribed
   AgentID	The agent ID logged into the extension
   AgentPassword	The password configured for that agent ID

   Some CTI servers do not require AgentID and AgentPassword for monitoring. In such cases, as the OpenCTI developer, you can ignore these properties when subscribing to events.
   Result: If subscribing to events for a device fails, Pega Call displays an error.
4. In the header of Dev Studio, search for the UnSubscribeForEvents activity in the OpenCTI adapter class.
5. Copy this activity to the implementation class and add the Pega Platform version 8.7 integration connector to unsubscribe from events for devices.
   The following table shows te properties of the UnSubscribeForEvents activity. You can see these properties on the adapter step page of the clipboard.

   Properties of the UnSubscribeForEvents activity

   Property Name	Property Name
   DN	The device number for which the event is subscribed
   AgentID	The agent ID logged in to the extension
   AgentPassword	The password configured for that agent ID

   If unsubscribing from events for a device fails, Pega Call displays an error.