The purpose of a terminal is to provide an interface to transmit commands to other computer systems. The terminal application is one type of program that employs an interface based on text to enable users to use a variety of services. Requesting Host Address instead of a phone numberThis error is caused by a computer that fails to detect the modem or dial-up connection. It’s no longer part of Microsoft’s plan to develop its own operating system. A favorite of powerful users, with thousands of applications but now it’s gone. The HyperTerminal was an extremely useful pre-installed Windows tool that was included prior to Windows 7.