EXFO FTB-500 (Window XP) - Manual (Page 214)

Preparing for Automation
204 FTB-500
Configuring DCOM Access to Your Unit
5. Right-click My Computer, and then select Properties.
6. In the My Computer Properties dialog box, click the Default
Properties tab.
7. Select Enable Distributed COM on this computer.
8. Under Default Distributed COM Communication Properties, in the
Default Authentication Level list, select Connect.
9. In the Default Impersonation Level list, select Identify.
10. Click OK.