From owner-freebsd-questions Wed Apr 3 02:40:59 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id CAA01693 for questions-outgoing; Wed, 3 Apr 1996 02:40:59 -0800 (PST) Received: from nixpbe.pdb.sni.de (mail.sni.de [192.109.2.33]) by freefall.freebsd.org (8.7.3/8.7.3) with ESMTP id CAA01680 for ; Wed, 3 Apr 1996 02:40:40 -0800 (PST) Received: (from nerv@localhost) by nixpbe.pdb.sni.de (8.6.12/8.6.12) id LAA00331 for freebsd-questions@freebsd.org; Wed, 3 Apr 1996 11:21:38 +0200 Message-Id: <199604030921.LAA00331@nixpbe.pdb.sni.de> Subject: Re: Public NTP-servers? To: pol@leissner.se (Peter Olsson) Date: Wed, 3 Apr 96 12:37:10 MET DST From: Greg Lehey Cc: freebsd-questions@freebsd.org In-Reply-To: <2.2.32.19960403110720.006cb270@lda>; from "Peter Olsson" at Apr 03, 96 12:07 pm X-Mailer: xmail 2.4 (based on ELM 2.2 PL16) Sender: owner-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk > 09:38 1996-04-03 DST you wrote: >>> We want to move our computers to a central time source to remove >>> timedifferences and be able to set all clocks at one server only. >>> >>> I have read the manpage for xntpd, which we intend to use. >> >> My question is, why do you want to do it this way? Your time accuracy >> is limited by propagation time, and in Germany at any rate you can get >> low-cost time receivers which are much more accurate. In addition, >> you're guaranteed not to have any network charges. >> >> Greg > > Very interesting. How do these time receivers work, Various standards bodies round the world broadcast an accurate time signal, backed up by an atomic clock with sub-microsecond accuracy. The German one is called DCF-77, is located in Frankfurt am Main, and can be received up to 1000 km away. I don't know if that includes your location, but it's likely that some other source would be available in Sweden. Have a look at http://www.igel.de/eiclock.htm for further details, but don't look at the prices. BTW, the $ price is significantly higher than the DM price mentioned in the German version of the page (http://www.igel.de/diclock.htm) > how much do they cost, I seem to recall the prices dropping to round the DM 100 mark (about $70) recently, but I can't be sure. > where can I get them? Offhand, at the office, I only found Igel. I'll check later when I get home. Greg