How to set up a group on the PBX SI2000 to combine several internal telephones with one group number?

Question

Telephony

Good afternoon, there is a PBX SI2000, there is Configuration Management software, how can I configure a group with a phone number assigned to the group, and then add internal numbers to this group so that internal users call the group number and get to the internal numbers we added, according to the configured us call logic inside this group?