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USNO Modem Time Service
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USNO Modem Time Service
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<p><h4>Synopsis</h4>

<p>Address: 127.127.24.<var>u</var>
<br>Reference ID: USNO
<br>Driver ID: USNO
<br>Serial Port: <code>/dev/cua<var>u</var></code>; 1200 baud, 8-bits,
no parity
<br>Features: none
<br>Requires: <code>/usr/include/sys/termios.h</code> header file with
modem control

<p><h4>Description</h4>

<p>No information available.

<p><h4>Monitor Data</h4>

<p>When enabled by the <code>flag4</code> fudge flag, every received
timecode is written as-is to the <code>clockstats</code> file.

<p><h4>Fudge Factors</h4>

<dl>

<dt><code>time1 <i>time</i></code>
<dd>Specifies the time offset calibration factor, in seconds and
fraction, with default 0.0.

<p><dt><code>time2 <i>time</i></code>
<dd>Not used by this driver.

<p><dt><code>stratum <i>number</i></code>
<dd>Specifies the driver stratum, in decimal from 0 to 15, with default
0.

<p><dt><code>refid <i>string</i></code>
<dd>Specifies the driver reference identifier, an ASCII string from one
to four characters, with default <code>USNO</code>.

<p><dt><code>flag1 0 | 1</code>
<dd>Not used by this driver.

<p><dt><code>flag2 0 | 1</code>
<dd>Not used by this driver.

<p><dt><code>flag3 0 | 1</code>
<dd>Enable <code>ppsclock</code> line discipline/streams module if set.

<p><dt><code>flag4 0 | 1</code>
<dd>Enable <code>clockstats</code> recording if set.

</dl>

<hr><address>David L. Mills (mills@udel.edu)</address></body></html>
