[189310] in North American Network Operators' Group
Re: Cost-effectivenesss of highly-accurate clocks for NTP
daemon@ATHENA.MIT.EDU (Mel Beckman)
Mon May 16 12:26:41 2016
X-Original-To: nanog@nanog.org
From: Mel Beckman <mel@beckman.org>
To: Lamar Owen <lowen@pari.edu>
Date: Mon, 16 May 2016 16:26:35 +0000
In-Reply-To: <5739EEFC.8020603@pari.edu>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org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