Depending on the computer's hardware it may be possible to use the computer to listen into/make/answer phone calls when connected to a phone line, but without an internet connection pcAnywhere and all other applications that communicate over the internet will not work.

Solution: Use the phone line connected to the computer to connect to a dial-up internet service, and then try launching pcAnywhere. It'll be extremely slow, assuming it doesn't time out, but it's a possibility.

John