To enable it, you have to add the Telnet Client Windows Feature. To do so: Start the Control Panel and go to Programs, Turn Windows features on or off:.
Open a command prompt window. Click Start, type 'cmd' in the Start Search box, and then press Enter; Type the following command: pkgmgr /iu:”TelnetClient” ...
Access the command line utility by typing ' cmd' in the run Programs Box · Type telnet to start the telnet utility in Windows 7 · To establish a telnet connection ...