The work-flow for creating a conference call with the Snom 870 has changed in the 8.7.5.x firmware. The old method has been deprecated.
Old method of creating a conference calls on 8.7.3.x and earlier
The setup conference context-sensitive touch button for setting up a conference has been deprecated.
The conference is now created automatically when the participants are drag-and-dropped into the context area from the info area.
Creating a Conference Call
Note: For an explanation of the icons, virtual keys and other functions of the Snom 870, please refer to the 870 User Manual