EXFO IQS-600 Integrated Qualification System - Manual (Page 110)

Using the IQS Manager Interface
102 IQS-600
Locating Units
Locating Units
Note: This feature is not available in Offline mode.
Since you can connect many IQS-610E-HS expansion units to your
IQS-610P-HS controller unit, it may become difficult to find a particular
module.
To help you locate units, click Locate Unit in the Current Modules
function tab. The corresponding module position display blinks for
ten seconds, allowing you to locate your module.
The first two digits indicate its position in the chain, while the third digit
indicates the unit’s number. You can personalize the unit numbers as
explained in Changing Unit and Module Identification on page 89.