<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>