<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>