Modem Symptoms

The modem dials and is picked up, but fails to negotiate a connection.

First Step : Check that the two PCs are both set to compatible protocols and settings.
More information : Settings such as data rate, parity, protocols etc. can produce incorrect results if not entered correctly. Ensure that these settings on your software match those of the system you are trying to 'dial in' to. It may also be worth checking your modem documentation to ensure that your modem is capable of these settings.