10. Attendant Buttons 
Attendant buttons show the name and presence status of internal subscribers. They offer a quick way to call these subscribers or transfer calls to them.
You can set up multiple tabs for Attendant buttons, e.g., for different
departments.
Attendant Buttons can be configured to show the picture of a user, if one is
available. If the user has no picture, a non-configurable color is shown,
generated based on the user's name.
They also show the status of internal subscribers (circle border color):
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Blue: Available or Idle
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Yellow: Ringing
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Red: Busy
Additionally, they can show the presence status of users if status is Busy (Red);
see Section 12.
Up to 300 Attendant buttons are available on a tab (100 by default). If no name
exists, the phone number is displayed.
The Attendant buttons on a tab are sorted by Last Name in alphanumeric ascending
order by default. Stations without names are sorted after the stations for which
a name can be displayed. External contacts are always sorted to the end of the
list.
Most of the configurations for Attendant Buttons are also available in the panel
functions toolbar; see Section 13.5.