Contacts Tab

If you press the following icon  it will take you to the below contacts screen.

Presence Tab

The first tab will show your presence sometimes referred to as BLF (Busy Lamp Fields from the old fixed telephone days). Here you can see whether your colleagues are on a call, in DND or online and available. Press the picture to bring up their profile, then press to call them.

 

The first tab will display your presence, also known as BLF (Busy Lamp Field). Here you can see whether your colleagues are on a call, in DND, available or unavailable.