static/netbsd/man4/man4.vax/dn.4 4.html


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<table class="head">
  <tr>
    <td class="head-ltitle">DN(4)</td>
    <td class="head-vol">Device Drivers Manual (vax)</td>
    <td class="head-rtitle">DN(4)</td>
  </tr>
</table>
<div class="manual-text">
<section class="Sh">
<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
<p class="Pp"><code class="Nm">dn</code> &#x2014; <span class="Nd">DN-11 serial
    autocall unit interface</span></p>
</section>
<section class="Sh">
<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
<p class="Pp"><code class="Cd">dn0 at uba? csr 0160020 vector dnintr</code></p>
</section>
<section class="Sh">
<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
<p class="Pp">NOTE: This driver has not been ported from
    <span class="Ux">4.4BSD</span> yet.</p>
<p class="Pp">The <code class="Nm">dn</code> device provides an interface
    through a DEC DN-11 (or equivalent such as the Able Quadracall) to an
    auto-call unit (ACU). To place an outgoing call one forks a sub-process
    which opens the appropriate call unit file,
    <span class="Pa">/dev/cua?</span> and writes the phone number on it. The
    parent process then opens the corresponding modem line
    <span class="Pa">/dev/cul?</span>. When the connection has been established,
    the open on the modem line <span class="Pa">/dev/cul?</span> will return and
    the process will be connected. A timer is normally used to timeout the
    opening of the modem line.</p>
<p class="Pp">The codes for the phone numbers are:</p>
<table class="Bl-column Bd-indent">
  <tr>
    <td>0-9</td>
    <td>number to be dialed</td>
  </tr>
  <tr>
    <td>*</td>
    <td>dial * (`:' is a synonym)</td>
  </tr>
  <tr>
    <td>#</td>
    <td>dial # (`;' is a synonym)</td>
  </tr>
  <tr>
    <td>-</td>
    <td>delay 20 milliseconds</td>
  </tr>
  <tr>
    <td>&lt;</td>
    <td>end of phone number (`e' is a synonym)</td>
  </tr>
  <tr>
    <td>=</td>
    <td>delay for a second dial tone (`w' is a synonym)</td>
  </tr>
  <tr>
    <td>f</td>
    <td>force a hangup of any existing connection</td>
  </tr>
</table>
<p class="Pp">The phone number to be dialed must be presented as one contiguous
    string.</p>
<p class="Pp">By convention, even numbered call units are for 300 baud modem
    lines, while odd numbered units are for 1200 baud lines. For example,
    <span class="Pa">/dev/cua0</span> is associated with a 300 baud modem line,
    <span class="Pa">/dev/cul0</span>, while <span class="Pa">/dev/cua1</span>
    is associated with a 1200 baud modem line,
    <span class="Pa">/dev/cul1</span>. For devices such as the Quadracall which
    simulate multiple DN-11 units, the minor device indicates which outgoing
    modem to use.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="FILES"><a class="permalink" href="#FILES">FILES</a></h1>
<dl class="Bl-tag Bl-compact">
  <dt><span class="Pa">/dev/cua?</span></dt>
  <dd>call units</dd>
  <dt><span class="Pa">/dev/cul?</span></dt>
  <dd>associated modem lines</dd>
</dl>
</section>
<section class="Sh">
<h1 class="Sh" id="DIAGNOSTICS"><a class="permalink" href="#DIAGNOSTICS">DIAGNOSTICS</a></h1>
<p class="Pp">Two error numbers are of interest at open time.</p>
<dl class="Bl-tag">
  <dt>[<code class="Er">EBUSY</code>]</dt>
  <dd>The dialer is in use.</dd>
  <dt>[<code class="Er">ENXIO</code>]</dt>
  <dd>The device doesn't exist, or there's no power to it.</dd>
</dl>
</section>
<section class="Sh">
<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
  ALSO</a></h1>
<p class="Pp"><a class="Xr">tip(1)</a></p>
</section>
<section class="Sh">
<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
<p class="Pp">A <code class="Nm">dn</code> driver appeared in
    <span class="Ux">Version&#x00A0;6 AT&amp;T UNIX</span>.</p>
</section>
</div>
<table class="foot">
  <tr>
    <td class="foot-date">June 5, 1993</td>
    <td class="foot-os">NetBSD 10.1</td>
  </tr>
</table>