To start, hit "Return" after the text:

	Trying 18.84.1.13 ...
	Connected to barton-test.mit.edu.
	Escape character is '^]'.

Type "END" to quit.

If all the lines into Barton are busy, you will get the message:

 	Barton is either unavailable or all lines are in use at this time.
 
	Password required, but none set
	Connection closed by foreign host.