Telnet is a network protocol designed to manage remote servers via the command line. Unlike Windows XP and Vista, Telnet is not installed in Windows 7. You need to activate it before using it. So let's get started.
Steps
Part 1 of 2: Install Telnet

Step 1. Open "Control Panel"
Telnet is not installed by default on Windows 7. To use this protocol, you must first activate it. You can do this through the "Control Panel", which can be opened through the "Start" menu.

Step 2. Open Programs and Features or Programs
The available option depends on how the Control Panel is displayed - by category or by icons. In any case, the same window will open.

Step 3. Click Turn Windows features on or off
You may need to enter the Administrator password.

Step 4. Find "Telnet Client"
In the list of available components, you will see a folder called Telnet Client. The components are displayed in alphabetical order - first there are names in Latin, then in Russian. Check the box next to Telnet Client and click OK. OK.
It may take a couple of minutes to install the client

Step 5. Install Telnet via command line
If you want to do everything through the command line, you can install Telnet with a quick command. First, start a command prompt by typing cmd in the Run dialog box. At the command prompt, type pkgmgr / iu: "TelnetClient" and press Enter. In a moment, you will be returned to the command line.
Reload the command line to start using Telnet
Part 2 of 2: Using Telnet

Step 1. Open Command Prompt
Telnet is started via the command line. You can open Command Prompt by pressing Win and typing cmd in the Run dialog box.

Step 2. Start Telnet Client
Type telnet and press Enter to start Telnet. The command prompt will disappear and the Telnet service will open, which will look like this: Microsoft Telnet>.

Step 3. Connect to the Telnet server
At the Telnet prompt, enter open serveraddress [port]. If the welcome window opens or the system asks for a username and password, then the connection was successful.
- For example, to view Star Wars in ASCII, type open towel.blinkenlights.nl and press Enter.
- You can also establish a connection directly from the command line by typing telnet serveraddress [port].

Step 4. End the Telnet session
When you are finished with Telnet Server, disable this utility before closing the window. To do this, open a Telnet command prompt by pressing Ctrl +]. Type quit and press ↵ Enter to end the session.