The VDN tables store one record per vector on which a VDN terminates.

Therefore, if the terminating vector for a specific VDN changes in a set interval, there are two records for that VDN - one per terminating vector.

This logic also applies to the Vector, Trunk, Trunk Group, and Split/Skill tables. If information is required from these tables, a sum Structured Query Language (SQL) query can be necessary to access complete data from each table.