EXFO FTB-8500 Series for FTB-200 - Manual (Page 360)

System Tabs
346 FTB-8500 Series and FTB-8120NGE/8130NGE
Default/Ethernet Test Preferences

Enable Automatic IP Address: Automatically selects DHCP when
a test is created allowing to dynamically obtain an IP address from
a DHCP server. The Enable Automatic IP Address check box is
cleared by default.

Subnet Mask: Enter the subnet mask for both the stream and the
Ethernet port. The default setting is 255.255.0.0.

Default Gateway: Enter the default getaway address for both the
stream and the Ethernet port. Default Gateway must be enabled to
enable the default gateway address field. The default setting is
0.0.0.0.
Enable: Enables the default gateway IP address for both the
stream and the Ethernet port. The Enable check box is not
selected by default.