EXFO FTB-7000 OTDR Series for FTB-500 - Manual (Page 48)

Setting Up Your OTDR
34 OTDR
Defining Cables
To define the subset or fiber name:
1. From the main window, press Setup.
2. From the Setup dialog box, select the Cable tab.
3. Press the button next to the Subset ID box, then select the Use
Subset box.
OR
Press the button next to the Fiber ID box.