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Practical Linux by Bill Ball, John Ray, Michael Turner, M. Drew Streib

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Selecting a Modem for Linux

Many different types of modems work with Linux. In order to use a modem, you must first determine which serial port is connected to your modem. Modems can be installed in serial ports on the back of a desktop computer or internal PC serial board, or as a PC card. Built-in modems often come with laptops and are indicated by the RJ-11 jack on the back of the laptop. Serial port devices for Linux are found in the /dev directory, with filenames containing tty. (Some older Linux systems can also have cua devices and newer systems might still show cua devices but be mapped to ttyS devices.) Table 11.1 lists the eight most common serial devices, along with the corresponding "traditional" DOS and Windows port names and addresses. ...

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