From owner-freebsd-hackers Fri Mar 6 17:50:18 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id RAA29956 for freebsd-hackers-outgoing; Fri, 6 Mar 1998 17:50:18 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from Kitten.mcs.com (Kitten.mcs.com [192.160.127.90]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id RAA29622 for ; Fri, 6 Mar 1998 17:49:47 -0800 (PST) (envelope-from karl@Mars.mcs.net) Received: from Mars.mcs.net (karl@Mars.mcs.net [192.160.127.85]) by Kitten.mcs.com (8.8.7/8.8.2) with ESMTP id TAA29876; Fri, 6 Mar 1998 19:49:40 -0600 (CST) Received: (from karl@localhost) by Mars.mcs.net (8.8.7/8.8.2) id TAA18878; Fri, 6 Mar 1998 19:49:39 -0600 (CST) Message-ID: <19980306194939.58793@mcs.net> Date: Fri, 6 Mar 1998 19:49:39 -0600 From: Karl Denninger To: shimon@simon-shapiro.org Cc: Terry Lambert , dmlb@ragnet.demon.co.uk, wilko@yedi.iaf.nl, julian@whistle.com, hackers@FreeBSD.ORG, lada@ws2301.gud.siemens.at Subject: Re: SCSI Bus redundancy... References: <199803070118.SAA25810@usr09.primenet.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.84 In-Reply-To: ; from Simon Shapiro on Fri, Mar 06, 1998 at 05:49:17PM -0800 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Fri, Mar 06, 1998 at 05:49:17PM -0800, Simon Shapiro wrote: > Telcos run equipment on 48VDC. In most switching rooms, not only you are > not allowed (and do not have) power grid AC, you cannot even generate it > inside your own cabinet. Well, yeah, but I often wonder just how smart that really is. 48VDC might sound rather "harmless". Its not. The power levels running around in those switching centers are high enough to make me *extremely* careful when working around it. Bridge the positive and negative poles, and you'll find out what I mean. -- -- Karl Denninger (karl@MCS.Net)| MCSNet - Serving Chicagoland and Wisconsin http://www.mcs.net/ | T1's from $600 monthly to FULL DS-3 Service | NEW! K56Flex support on ALL modems Voice: [+1 312 803-MCS1 x219]| EXCLUSIVE NEW FEATURE ON ALL PERSONAL ACCOUNTS Fax: [+1 312 803-4929] | *SPAMBLOCK* Technology now included at no cost To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message