An External Modem is a modem that resides in a self-contained box outside the computer system. Contrast with an internal modem, which resides on a printed circuit board inside the computer. External modems tend to be slightly more expensive than internal modems. Many experts consider them superior because they contain lights that indicate how the modem is functioning. In addition, they can easily be moved from one computer to another. However, they do use up one COM port.
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