Altigen AltiWare OE/ACC Version 5.0A Administration Manual page 315

2. If you select an extension in the Extension Configuration General
window, then click the Group tab, you open the Extension view of the
group window, which provides for assigning groups to the selected
extension.
This section discusses the first way first.
Important: Regardless of which way you add extensions to groups, the
order in which you add extensions can have consequences. For
example, one way of handling incoming huntgroup calls is to
always send the call to the first extension, if available, the
second if the first is not available, and so forth.
When you add an extension to a huntgroup, the extension is in
the "Logout" state. The huntgroup member must manually log
in.
AltiWare OE System Installation & Administration Manual
Extension and Group Configuration
10-23