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 8		<title>PTB Modem Time Service</title>
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13		<h3>European Automated Computer Time Services</h3>
14		<hr>
15		<p>Several European countries use the following message data format:</p>
16		<p><font size="-1" face="Courier New">Data format<br>
17				0000000000111111111122222222223333333333444444444455555555556666666666777777777 7<br>
18				0123456789012345678901234567890123456789012345678901234567890123456789012345678 9<br>
19				1995-01-23 20:58:51 MEZ 10402303260219950123195849740+40000500 *<br>
20				A B C D EF G H IJ K L M N O P Q R S T U V W XY Z&lt;CR&gt;&lt;LF&gt;<br>
21				A year<br>
22				B month<br>
23				C day<br>
24				D hour<br>
25				E : normally<br>
26				A for DST to ST switch first hour<br>
27				B for DST to ST switch second hour if not marked in H<br>
28				F minute<br>
29				G second<br>
30				H timezone<br>
31				I day of week<br>
32				J week of year<br>
33				K day of year<br>
34				L month for next ST/DST changes<br>
35				M day<br>
36				N hour<br>
37				O UTC year<br>
38				P UTC month<br>
39				Q UTC day<br>
40				R UTC hour<br>
41				S UTC minute<br>
42				T modified julian day (MJD)<br>
43				U DUT1<br>
44				V direction and month if leap second<br>
45				W signal delay (assumed/measured)<br>
46				X sequence number for additional text line in Y<br>
47				Y additional text<br>
48				Z on time marker (* - assumed delay / # measured delay)<br>
49				&lt;CR&gt;!&lt;LF&gt; ! is second change !<br>
50			</font></p>
51		<p>This format is an ITU-R Recommendation (ITU-R TF583.4) and is now available from the primary timing centres of the following countries: Austria, Belgium, Germany, Italy, The Netherlands, Poland, Portugal, Romania, Spain, Sweden, Switzerland, Turkey and United Kingdom. Some examples are:</p>
52		<ul>
53			<li>In Germany by Physikalisch-Technische Bundesanstalt (PTB)'s timecode service. Phone number: +49 5 31 51 20 38.
54				<p>For more detail, see <a href="http://www.ptb.de/english/org/4/43/433/disse.html">http://www.ptb.de/english/org/4/43/433/disse.htm</a></p>
55			<li>In the UK by National Physical Laboratory (NPL)'s TRUETIME service. Phone number: 0891 516 333
56				<p>For more detail, see <a href="http://www.npl.co.uk/npl/ctm/truetime.html">http://www.npl.co.uk/npl/ctm/truetime.html</a></p>
57			<li>In Italy by Istituto Elettrotecnico Nazionale &quot;Galileo Ferrais&quot; (IEN)'s CTD service. Phone number: 166 11 46 15
58				<p>For more detail, see <a href="http://www.ien.it/tf/time/Pagina42.html">http://www.ien.it/tf/time/Pagina42.html</a></p>
59			<li>In Switzerland by Swiss Federal Office of Metrology's timecode service. Phone number: 031 323 32 25
60				<p>For more detail, see <a href="http://www.metas.ch/en/labors/official-time/modem/index.html">http://www.ofmet.admin.ch/de/labors/4/Zeitvert.html </a></p>
61			<li>In Sweden by SP Swedish National Testing and Research Institute 's timecode service. Phone number: +46 33 415783.
62				<p>For more detail, see <a href="http://www.sp.se/metrology/timefreq/eng/tandf.htm">http://www.sp.se/metrology/timefreq/eng/tandf.htm</a></p>
63		</ul>
64		<dl></dl>
65		<h4>Additional Information</h4>
66		<p><a href="../refclock.html">Reference Clock Drivers</a></p>
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