EXFO FTB-800 Series for FTB-1 - Manual (Page 506)

Suspend and Resume
496 FTB-700G/800 Series
Resume Operation
Resume Operation
To enter the resume operation, turn on the FTB-1 by pressing the power
button. During the resume operation, the module is re-initialized.
Note: In the event a manual shutdown of the FTB-1 occurs, while the resume
operation is in-progress, the resume operation is terminated and all the test
configuration information is lost.
The following conditions prevent the resume operation:

The module status has changed (mismatch in serial number or
module is missing).

A module failure is detected.