Telnet is a simple service monitor that checks for a Telnet server on port 23. If no telnet service responds on this port, then the service is considered down.
To begin the service check, click the Telnet button. Refer to the Telnet application Help for more information.
Important: The Telnet protocol handler is disabled by default in Microsoft Internet Explorer 7. To re-enable it, see Re-enabling the Telnet protocol handler.