EXFO FTB-500 (Window XP) - Manual (Page 217)

Preparing for Automation
FTB-500 207
Configuring DCOM Access to Your Unit
5. In the EXFO KernosHost Properties dialog box, click the Security tab.
6. Under Launch and Activation Permissions and Access Permissions,
select Use Default.
This ensures the EXFO IcSCPIAccess Class component uses the default
lists instead of the customized lists.
7. Click OK.
8. Restart your FTB-500.
The EXFO IcSCPIAccess Class component, located on your FTB-500,
cannot be accessed with DCOM.