Commit b6edab68 authored by Sanjeev Gupta's avatar Sanjeev Gupta Committed by Eric S. Raymond

Document potential removal of some driver8 (PARSE) modes

parent 205926d2
......@@ -14,9 +14,15 @@ PPS device: /dev/refclockpps-'u'; alternate PPS device
== Description ==
The PARSE driver supports 20 different clock
The PARSE driver supports 25 different clock
types/configurations. PARSE is actually a multi-clock driver.
Note that some of these modes below are to support equipment that
has not been commercially available for a long time; and may be
removed. See
https://www.ntpsec.org/removal-plan.html[Feature removals] for a
discussion of this issue.
The actual receiver status is mapped into various synchronization states
generally used by receivers. The driver is configured to interpret the
time codes of Meinberg DCF77 AM receivers, DCF77 FM receivers, Meinberg
......@@ -66,9 +72,10 @@ refclock_ppstime::
== Supported Devices ==
Currently, twenty-four clock types are supported by the PARSE driver and
Currently, twenty-five clock types are supported by the PARSE driver and
up to four (devices /dev/refclock-0 - /dev/refclock-3) of these clocks
may be operational at any one time.
A note on the implementations:
* These implementations were mainly done without actual access to the
......@@ -104,17 +111,23 @@ This implementation was provided and verified by SEL and
http://networktimefoundation.org[Network Time Foundation] has an
SEL-2407 in one of its development labs.
The pictures below have been taken from and are linked to the vendors'
web pages.
The pictures below have been archived from the vendors' web pages.
* *server 127.127.8.0-3 mode 0*
+
*http://www.meinberg.de[Meinberg] http://www.meinberg.de/english/products/timesource.htm#dcf---freq_sync[PZF5xx receiver family] (FM demodulation/TCXO / 50μs)*
*http://www.meinberg.de[Meinberg] https://www.meinbergglobal.com/english/archive/pzf511.htm[PZF5xx receiver family] (FM demodulation/TCXO / 50μs)*
+
WARNING: This equipment is no longer available for commercial sale, and
support may be removed in the future. See:
https://www.ntpsec.org/removal-plan.html[Feature removals]
* *server 127.127.8.0-3 mode 1*
+
*http://www.meinberg.de[Meinberg] http://www.meinberg.de/english/products/timesource.htm#dcf---freq_sync[PZF5xx receiver family] (FM demodulation/OCXO / 50μs)*
*http://www.meinberg.de[Meinberg] https://www.meinbergglobal.com/english/archive/pzf511.htm[PZF5xx receiver family] (FM demodulation/OCXO / 50μs)*
+
WARNING: This equipment is no longer available for commercial sale, and
support may be removed in the future. See:
https://www.ntpsec.org/removal-plan.html[Feature removals]
image::pic/pzf511.jpg[http://www.meinberg.de/english/products/pzf-eurocard.htm]
......@@ -140,10 +153,18 @@ that comes with the Meinberg driver package.
* *server 127.127.8.0-3 mode 3*
+
http://www.elv.de/[ELV] *DCF7000 (sloppy AM demodulation / 50ms)*
+
WARNING: This equipment is no longer available for commercial sale, and
support may be removed in the future. See:
https://www.ntpsec.org/removal-plan.html[Feature removals]
* *server 127.127.8.0-3 mode 4*
+
*Walter Schmid DCF receiver Kit (AM demodulation / 1ms)*
+
WARNING: This equipment is no longer available for commercial sale, and
support may be removed in the future. See:
https://www.ntpsec.org/removal-plan.html[Feature removals]
* *server 127.127.8.0-3 mode 5*
+
......@@ -182,11 +203,19 @@ image:pic/igclock.gif[http://www.igel.de/eigelmn.html]
* *server 127.127.8.0-3 mode 9*
+
*http://www.trimble.com[Trimble] ftp://ftp.trimble.com/pub/sct/embedded/bin/Data%20Sheets/SveeSix2.PDF[SVeeSix GPS receiver] TAIP protocol (GPS / <<1&mu;s)*
+
WARNING: This equipment is no longer available for commercial sale, and
support may be removed in the future. See:
https://www.ntpsec.org/removal-plan.html[Feature removals]
* *server 127.127.8.0-3 mode 10*
+
*http://www.trimble.com[Trimble] ftp://ftp.trimble.com/pub/sct/embedded/bin/Data%20Sheets/SveeSix2.PDF[SVeeSix GPS receiver] (GPS / <<1&mu;s) (no kernel support yet)*
+
WARNING: This equipment is no longer available for commercial sale, and
support may be removed in the future. See:
https://www.ntpsec.org/removal-plan.html[Feature removals]
+
image:pic/pd_om011.gif[http://www.trimble.com/cgi/omprod.cgi/pd_om011.html]
+
image:pic/pd_om006.gif[http://www.trimble.com/cgi/omprod.cgi/pd_om006.html]
......
......@@ -161,7 +161,7 @@ link:rate.html[Rate Management]::
Describes the principles of rate management to minimize network load
and defend against DoS attacks.
link:refclock.html[Reference Clock Support]::
Describes the collection of radio clocks used to synchronize primary
Describes the collection of clocks and devices used to synchronize primary
servers.
link:warp.html[How NTP Works]::
Gives an overview of the NTP daemon architecture and how it works.
......
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