Telnet client is a tool useful for network trouble shooting. However, Telnet client is not install in Windows 7 by default. To install Telnet client in Windows 7, follow the following procedures:
1. Select “Programs And Features” from Control Panel
2. Select “Turn Windows features on or off”
3. Check Telnet Client
4. Hit OK
With this setting, you should be able to use Telnet client on your command – Cmd.