IVT GN-BTD02 User Manual page 40

Trust all devices
Connection requests will be accepted from every device.
Prompt user if the device is not trusted for this service
If a non-trusted device attempts to access the service, a dialog will appear to
allow you to accept or reject the connection.
Reject devices from using the service if not trusted for the service
If a non-trusted device attempts to access the service, the connection will be
rejected automatically without informing the user.
Notes:
If a device is trusted for a service, it may connect to this service on your local
device without informing you.
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