EXFO FTB-500 (Window XP) - Manual (Page 459)

Communicating Through TCP/IP over Telnet
FTB-500 451
Executing SCPI Commands Over Telnet
3. Enter the desired SCPI commands as follows:

For a single SCPI command: Type or copy the desired command in
the Telnet editor window, and then press ENTER to execute it.

For multiple SCPI commands: Copy the desired commands from
any script file, enclose them in a BEGIN and END block in the
Telnet editor window, and then press ENTER. For more
information, see Internal Commands of the TCP/IP over Telnet
Protocol on page 453.
Note: Multiple commands that are not enclosed in BEGIN...END blocks will be
executed, but problems may occur (results of one command mixed with
the results of another one, skipped commands, etc.).
Once at least one valid command is executed, the module is blocked
for any other sessions until the module is released. For more
information, see Releasing Modules on page 452.
4. Click to close the session.