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<th colspan="3" align="center">LPRng Reference Manual: 24
Sep 2004 (For LPRng-3.8.28)</th>
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<h1 class="SECT1"><a name="SERIAL">12.10. Serial
Printer</a></h1>
<p>Options used:</p>
<ul>
<li>
<p><var class="LITERAL">br=</var><span class=
"emphasis"><i class="EMPHASIS">serial port bit
rate</i></span></p>
</li>
<li>
<p><var class="LITERAL">rw</var> FLAG <span class=
"emphasis"><i class="EMPHASIS">device opened
RW</i></span></p>
</li>
<li>
<p><var class="LITERAL">stty=</var><span class=
"emphasis"><i class="EMPHASIS">stty options for serial
port configuration</i></span></p>
</li>
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<p>The following is a typical printcap for a serial
printer:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN5912"></a>
<pre class="SCREEN">
# Local Serial ASCII printer
lp2
:lp=/dev/ttya
:rw
:cm=Serial printer
:sd=/var/spool/lpd/lp2
:stty=9600 -echo -crmod -raw -oddp -evenp pass8 cbreak ixon
:filter=/usr/local/sbin/lpf
:mx=0
</pre>
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<br>
<br>
<p>Let's examine the new options:</p>
<ol type="1">
<li>
<p>A serial port is usually <span class="emphasis"><i
class="EMPHASIS">bidirectional</i></span>, and printers
will report errors back to the host computer. The <var
class="LITERAL">rw</var> flag will cause the printer port
to be opened <var class="LITERAL">read-write</var>, and
the <b class="APPLICATION">lpd</b> server will report
status information.</p>
</li>
<li>
<p>The <var class="LITERAL">stty</var> option specifies
the <tt class="COMMAND">stty(1)</tt> flags and line speed
needed to configure the serial line (See <a href=
"secserial.htm">Serial Printers</a> for details).</p>
</li>
<li>
<p>The legacy <var class="LITERAL">br</var> (bit rate)
option can be used to specify the line speed as well.</p>
</li>
</ol>
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