Detecting and Configuring a Modem

More than 38 million users in the United States and another 85 million users around the world now connect to the Internet with cable or digital subscriber line (DSL) service, but for many users a modem is the standard way to connect with an Internet service provider (ISP) using the Point-to-Point Protocol (PPP). Other common tasks for modems include sending and receiving faxes. If you add or change your modem after the initial installation, you must configure Ubuntu to use the new modem to perform all these tasks.

Ubuntu includes several tools you can use to configure and use an internal or external modem in your notebook or PC. Chapter 18, "Network Connectivity," contains the details about configuring Ubuntu to connect to the Internet using a modem. This section covers how to configure and use modems using serial ports (using a standard formerly known as RS232, but now called EIA232) or USB.

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