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A line of meaningless characters appears on the screen when you send or receive messages over phone lines.	The computer on the other end of the phone line is sending information to your computer in a form your computer isn't set up to receive.	You're using either incompatible bauds or incompatible data formats (the wrong number of data bits or stop bits, or the wrong kind of parity). Check the documentation furnished by the information service to see what specifications the other computer is using, and then change the way your computer is set up to exchange information by using your communications application or the Control Panel Program.

Characters are lost during information exchange.	There is too much distortion on the phone lines to transmit information at the speed you're using.	Change to a lower baud, if possible, on both the sending and the receiving end.
Information sent through the modem doesn't appear on your screen.	The other computer isn't echoing information back to your computer. It's a half-duplex modem.	Change the Echo setting to Yes by using the Control Panel Program or the communications application.