Once you have paired and connected your mobile phone to the base, the base will automatically connect to it when the mobile phone comes into range of the base.
You can manually disconnect your mobile phone from the base by short pressing the base Bluetooth pairing button when it is solid blue. However if you do this, you must manually reestablish a connection with your mobile phone by pressing the base Bluetooth button again, before the auto connection feature will resume.
You may customize this feature by using the Plantronics Control Panel by going to
Plantronics Control Panel >
Device Settings >
Auto Connect to Mobile Phone.