I have a previous post about installing telnet.exe in windows 7, however, I explain how to do it using the UI. You may need to install telnet.exe from the command line.
To install telnet.exe on Windows 7 from the command line, run this command:
C:\Windows\system32>dism.exe /online /Enable-Feature:TelnetClient
Now telnet to a machine:
c:\> telnet 10.1.1.1
Yes, it is that easy. Of course, you may think about using ssh these days as telnet just isn’t that secure. However, telnet is used for other things, such as port testing.
You can telnet using a different port or test that a port is open just by adding the port number.
c:\> telnet 10.1.1.1 3389