Description: This table defines the local numbers (extensions), that shall be used within PABX and assigns an identifier to it. Besides the extension is assigned to a terminal and user via apropriate identifiers and to either a physical or a logical destination. The items pabxExtSlot and pabxExtUnit moved to the terminal table as every extension must be associated with a terminal and, moreover, a terminal is always as a whole physically attached to a slot and unit. Also pabxExtUser is no longer valid, because the associated user is now refered to via the pabxExtUserId, avoiding some possible configuration faults. Rows are deleted from the table by setting the object pabxExtDestination to the value .