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

    <title>Dial-Up Connection Lifetime</title>

    <para>

        The server computer restricts the lifetime of established

        dial-up connections to 15 minutes from the establishment

        moment on. Once the connection has been established, if the

        link is idle for 1 minute, the server computer will also close

        the established connection to free the telephone line.  This

        control can be implemented through the

        <option>maxconnect</option> and <option>idle</option> options

        inside the <application>pppd</application>'s configuration

        file.

    </para>

    <para>

        The server computer allows incoming connections everyday from

        10:00PM to 12:00AM. This control can be implemented through a

        cron job and the <filename>/etc/nologin.ttyxx</filename> file;

        where ttyxx represents the device name of your modem

        (e.g., <filename>/etc/nologin.ttyACM0</filename> would prevent

        the Modem device installed in

        <filename>/dev/ttyACM0</filename> from answering calls).

    </para>

</sect1>