<section id="preface-overview">

    <title>Overview</title>

    <para>
        This manual describes two computers configuration, one acting
        as server and other as client. The server computer will be
        configured to provide internet services and the client to make
        use of those internet services provided by the server
        computer. The connection medium both client and server
        computer use is the telelphone line (i.e., the same medium you
        use to realize phone calls).  In this configuration, both
        client and server computers use special devices named
        <quote>Modems</quote> to transmit data in form of sound across
        the telephone line.
    </para>
    
    <para>
        The infrastructure described in this chapter is made available
        to you free of charge, however, you should know that
        maintaining it costs both money and time. For example, for
        each hour the server computer is on production there is an
        electrical consume that need to be paid every month.
        Likewise, each call that you establish from the client
        computer to the server computer will cost you money, based on
        the location you made the call from and the time you spend
        connected.
    </para>

    <para>
        The infrastructure described in this chapter could be a good
        choise when the only communication medium you have access to
        is a telephone network.
    </para>

</section>