ntplogtemp: Record nvme temperatures on Asahi
[ntpsec.git] / docs / tf582_4.adoc
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1 = European Automated Computer Time Services
2 include::include-html.ad[]
4 The National Laboratories of many European countries provide
5 time information in a standardised format, an ITU-R
6 Recommendation (ITU-R TF583.4).  Information is provided
7 over a dial-up modem, with one 78-char segment every second.
8 A description of the time code is available at
9 https://www.ptb.de/cms/en/ptb/fachabteilungen/abt4/fb-44/ag-442/dissemination-of-legal-time/dissemination-of-time-via-the-public-telephone-network/the-european-telephone-time-code.html
11 The following countries have traditionally provided this service:
12 Austria, Belgium, Germany, Italy, The Netherlands, Poland, Portugal,
13 Romania, Spain, Sweden, Switzerland, Turkey and United Kingdom.
15 Note that the service is usually available from outside the country
16 as well, as long as you are willing to make a long-distance phone
17 call.
19 Some examples are:
21 * In Germany, Physikalisch-Technische Bundesanstalt (PTB)'s timecode
22 service. Phone number: +49 5 31 51 20 38.
24 For more detail, see
25 https://www.ptb.de/cms/index.php?id=1786&L=1
27 * In the UK, National Physical Laboratory (NPL)'s Telephone Time Service.
28 Phone number: 020 8943 6333
30 For more detail, see https://www.npl.co.uk/science-technology/time-frequency/products-and-services/time/time-synchronisation-of-computers-to-utc(npl)
32 * In Italy, L'Istituto Nazionale di Ricerca Metrologica
33 (INRIM)'s CTD service. Phone numbers: 011 39 19 263 and 011 39 19 264
35 For more detail, see https://www.inrim.it/res/tf/ctd_i.shtml
37 * In Sweden, SP Swedish National Testing and Research Institute's
38 timecode service. Phone number: +46 33 415783.
40 For more detail, see https://www.sp.se/en/index/services/time_sync/modem_time/Sidor/default.aspx
42 == Additional Information
44 link:refclock.html[Reference Clock Drivers]
46 '''''
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