EXFO FTB-500 (Window XP) - Manual (Page 211)

Preparing for Automation
FTB-500 201
Configuring DCOM Access to Your Unit
21. Repeat steps 19 and 20 for each newly added user.
Note: You can also deny connection permission for specific users.
22. Click OK to close the Access Permission dialog box.
23. Click OK to close the EXFO KernosHost Properties dialog box.
24. Restart your FTB-500.
The EXFO IcSCPIAccess Class component, located on your FTB-500,
can now be accessed with DCOM.
Note: To run DCOMCNFG.EXE, you need Administrator access rights.