https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/ff699001(v=ws.11)

Telnet is a network protocol allowing text-based, remote command-line access, often used for legacy equipment management, though it lacks encryption. Hilgraeve provides updated solutions for Windows 10 and 11, including HyperTerminal Private Edition for standard connections and HyperACCESS for advanced automation and secure SSH support. For more information, visit Hilgraeve. HyperTerminal telnet software for Windows – Hilgraeve