In this case study, agents working for the Alpha service bureau handle calls for three different companies - ABC, XYZ , and JYK. The processing for all three companies is the same, but the announcements are different.

Since the processing is identical, Alpha decides to use the same vector for all three call types. VDN variables make this possible because Alpha can use a VDN variable to define the different announcement extensions. Each call type is routed to three different VDNs - one for each company. In this example, the V1 VDN variable defines the different announcement extensions used for the initial announcement in the vector. All three VDNs are assigned to vector 5.