You may be able to enable or disable your group membership for some of the groups to which you belong.
The system administrator is able to configure whether you have access to the Membership, State and Fallback options of a group. If you are not configured for any groups, the Group menu is not shown
To do this during a call, press the PHONE key and then press Features.
To change your membership to the highlighted group, press Change.
To change your membership to all groups, press More and then press either All Ena or All Dis.