This usually means that your computer does not have a dial-up modem present. If you are sure that you do have a modem you probably need to either restart the computer, or re-install the modem drivers. In the case of a USB modem please ensure that it is still plugged in.
I am using HyperTerminal PE to connect to a dial up system, and it is asking for a host address.
June 11, 2015 by