Operating Modes and Privileges

The application can request one of two operating modes when opening a phone device. These modes reflect the privileges the application requests for the device:

• Opening a phone for monitor privileges lets the application determine the status of the phone device. Messages are sent to the application when status changes on the phone device are detected.
• An application that opens a phone device for owner privileges can use operations that modify the state of the phone device. Owner privilege automatically includes full monitor privileges as well. At any time, a given phone device can be open only once for owner privileges, but multiple times for monitor privileges. All phoneSet operations require owner privileges, while all phoneGet operations require only monitor privileges.