EXFO FTB-635 Wideband Copper and DSL Test Module - Manual (Page 324)

xDSL Tests: Using the Main Menu
316 FTB-635
Test Configuration
LAN Setup
The LAN tab is available when the Access mode selected in WAN setup is
not Sync Only. LAN setup allows you to configure the parameters required
when working in pass through mode, and the LAN (local area network) is
connected to the external device which supports 10/100 Ethernet.

Access mode is a read only entry displaying the option selected in
WAN setup.

For LAN port

Enable allows traffic to your device on the LAN port, and traffic to
the platform.

Disable allows traffic only to the platform and not to your device.

Sniffing port allows you to Enable/Disable capturing/sniffing the
network traffic by platform test applications. The shortcut to Expert
IPTV Test Tools in the Application window of xDSL must be enabled
when sniffing is enabled. (WireShark is already enabled.)