90 CHAPTER 2: D IAL P LAN■ To increase the number of VTLs above one of the levels on a system,you must add one or more incremental licenses of 2 VTLs each.To install a VTL license:1 In the NBX NetSet - Main Menu window, click Operations. Click theLicenses tab and the Add License button. In the text boxes, type thelicense key code.2 Click OK and then restart the NBX system.Dial PlanConfigurationYou configure the dial plan after you install the VTL license. See “LicenseInstallation” on page 89 for information about VTL licenses.To configure the dial plan for VTLs, you must define:■ Routes within the dial plan■ Digit sequences to be used to select those routes■ Operations to be performed for each routeExample: Dial Plan with Site-Unique ExtensionsIn Figure 10, each of the three sites uses a unique extension range. In theInternal table in the Chicago system dial plan, the entries shown inFigure 12 control the routing of calls if a user dials an extension in the2000 through 2999 range (Atlanta extensions) or the 3000 through 3999range (Dallas extensions) respectively. The dial plans for the Atlanta andDallas NBX systems would contain similar, but not identical entries.An explanation of each line in the dial plan follows Figure 12.
