EXFO FTB/IQS-85100G Packet Blazer for FTB-500/IQS-600 - Manual (Page 70)

Test Setup - Test Configurator, Timer, and System
60 FTB/IQS-85100G
Modify Structure Button

Loopback Mode
Note: Only available for Smart Loopback Ethernet test application.
Transparent (Pseudo-Physical) check box when selected (cleared by
default), determines that the Smart Loopback operates as a physical
loopback by transmitting all received frames unaltered and without
discrimination. When the check box is cleared, the Loopback mode is
selectable from Loopback on page 145.
In transparent mode, the Network tab and the Ping & Trace Route
functions are not available.
Note: The Transparent mode is intended to be used for point-to-point topology;
not for switched or routed networks. Use the Transparent mode with
caution because all received frames are looped back without
discrimination.