Lead
A single phone number + associated metadata that VICIdial dials.
A lead is one row in vicidial_list — a phone number plus name, address, custom fields, current status. Leads belong to one list, which belongs to one campaign.
A lead has a status that drives what the dialer does with it:
NEW— never dialedNA— no answerB— busyAB— abandoned (dropped)SALE— converted, won't redialDNC— opt-out
The dial plan picks leads where status matches the campaign's Dial Statuses setting.