<sect1 id="connectivity-dialup-overview">

    <title>Overview</title>

    <para>

        This chapter describes an infrastructure where computers

        communicate one another using the telephone line as medium for

        data transmission.  This infrastructure could result very

        useful to you when you want to use your computer to share

        information with your friends and the only communication

        medium you and your friends have access to is a telephone

        network.

    </para>

</sect1>