<sect1 id="server-usage-overview">

    <title>Overview</title>

    <para>

        The infrastructure described in this chapter uses the

        client/server model to provide a public mail service through

        the telephone line. In this configuration, we (the poeple

        building the infrastructure) provide the information you (the

        person using the infrastructure) need to know in order to

        establish a point-to-point connection from the client computer

        to the server computer through 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>

        In this chapter we discuss usage convenctions we all must be

        agree with, in order to achieve a practical and secure

        interchange system.

    </para>

</sect1>