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

    <title>Overview</title>

    <para>

        In this infrastructure, dial-up connections will always be

        established from the client computer to the server computer

        and never the other way around.  The main purpose of a client

        computer to establish a dial-up connection with the server

        computer will be to use one or more internet services provided

        in the server computer through the telphone line.

    </para>

    <para>

        In order for the server computer to answer telephone calls, it

        is required to install a Modem device in it (see 

        linkend="server-install-modem" />). Once the Modem device has

        been installed, you need to install and configure both

        <application>mgetty</application> and

        <application>pppd</application> programs.  The

        <application>mgetty</application> program must be run by

        <systemitem class="daemon">init</systemitem> daemon in order

        to take control over the Modem device. By default, inside

        &TC;; (release 5.5), mgetty isn't configured to start with

        <systemitem class="daemon">init</systemitem> daemon so you

        need to do it yourself (see ...). Later, for attending

        connection requests, you need to configure mgetty to use the

        <application>pppd</application> program, so the Point-to-Point

        Protocol (PPP) can be talked and IP packages can be

        interchanged between the client computer and the server

        computer. Later, you need to configure

        <application>pppd</application> to adjust it to your needs

        (see ...). 

    </para>

    <para>

        Once you've configured both <application>mgetty</application>

        and <application>pppd</application> programs, the server

        computer should be ready to attend incoming calls.  The

        remaining of this chapter describes the way incoming calls are

        attended by the server computer once they have arrived to its

        Modem device.

    </para>

</sect1>