EXFO FTB-500 (Window XP) - Manual (Page 253)

Using FTB Products in an Automated Test Environment
FTB-500 243
Monitoring Remote Commands

If monitoring using TCP/IP, which provides sending SCPI
commands over TCP/IP through Telnet from the EXFO Instrument
Control, you are automatically connected to the monitoring
system.
Note: Port 5024 is designated for sending SCPI commands in the Telnet protocol.
Once connected, your current connection information will appear
in the All Connections View tab, and the commands will appear as
a list in the lower part of the window.
The Disconnect button becomes available for you to click when
you are ready to disconnect.
Connection
tabs
List of
connections