EXFO FTB-800 Series for FTB-1 - Manual (Page 130)

Test Setup - Test Configurator, Timer, and System
120 FTB-700G/800 Series
EtherSAM - Global
EtherSAM - Global
From the Test menu, tap Setup, Test Configurator, tap on the test block,
and on the Global tab.
Dual Test Set

Dual Test Set (DTS) check box when selected (cleared by default)
enables EtherSAM Dual Test Set. Once Dual Test Set is enabled it is
possible to select a remote unit by clicking on the Discover Remote
button.
Note: Alternatively it is possible to use the Discover Remote button to connect to a
remove module and automatically enable the Dual Test Set. For more
details, refer to Discover Remote Button on page 464.
Disconnected indicates that there is no connection established with a
remote module.
Connected indicates that the connection is established with a remote
module.

Discover Remote button allows to discover remote modules
supporting Remote Loopback and/or Dual Test Set. For more details,
see Discover Remote Button on page 464.