Managing Existing Virtual Tie Lines 101Successful VTL CallIf there are no network problems:1 The first line (Entry 1, OperId 1) removes the digits 72.2 The second line (Entry 1, OperId 2) prepends the IP address of the NBXsystem at site B in front of the dialed extension number.Unsuccessful VTL CallIf a network problem or a lack of VTL ports prevents the VTL call fromreaching its destination:1 The third line (Entry 2, OperId 1) removes the digits 72.2 The fourth line (Entry 2, OperId 2) prepends an appropriate dial string anddials out over an analog telephone line.Managing ExistingVirtual Tie LinesAfter VTLs are installed and you have verified that they are workingproperly, you can manage them using the NBX NetSet utility. There areNBX NetSet utility functions for:■ Modifying a Virtual Tie Line Name■ Viewing and Resetting Virtual Tie Line Statistics■ Enabling Audio Compression for VTL Calls■ Enabling Silence Suppression on VTL CallsModifying a VirtualTie Line NameYou can change the name of a VTL. The name appears in NBX NetSetlists, and helps you identify each VTL.To modify the name of a VTL:1 In the NBX NetSet - Main Menu window, click Device Configuration.2 Click the Virtual Tie Lines tab. The window that appears contains the listof existing VTLs, and the status of each one.3 Select a VTL from the list.4 Click Modify. The Modify dialog box appears.5 In the New VTL name text box, type the name you want to assign to thisVTL. Click OK. Verify that the name change is on the Virtual Tie Lines tab.
