From owner-freebsd-questions@FreeBSD.ORG Sat Oct 7 18:45:21 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7583D16A49E for ; Sat, 7 Oct 2006 18:45:21 +0000 (UTC) (envelope-from dan@dan.emsphone.com) Received: from dan.emsphone.com (dan.emsphone.com [199.67.51.101]) by mx1.FreeBSD.org (Postfix) with ESMTP id BBB6043D4C for ; Sat, 7 Oct 2006 18:45:20 +0000 (GMT) (envelope-from dan@dan.emsphone.com) Received: (from dan@localhost) by dan.emsphone.com (8.13.6/8.13.8) id k97IjFNg092360; Sat, 7 Oct 2006 13:45:15 -0500 (CDT) (envelope-from dan) Date: Sat, 7 Oct 2006 13:45:15 -0500 From: Dan Nelson To: Michael Johnson Message-ID: <20061007184515.GE65461@dan.emsphone.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-OS: FreeBSD 6.2-PRERELEASE X-message-flag: Outlook Error User-Agent: Mutt/1.5.13 (2006-08-11) Cc: freebsd-questions@freebsd.org Subject: Re: POE networking, what's the range? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 07 Oct 2006 18:45:21 -0000 In the last episode (Oct 07), Michael Johnson said: > This isn't really a FreeBSD-specific question but does anyone know > the range of Power Over Ethernet? I want something to go from my > house to my garage apartment then hook a wireless access point in to > the POE box. The garage and the house are on their own power circuit > but where the lines split is in between the house and the garage. I'm > thinking it'll be around 600ft plus all the wiring in the house and > garage. I'm kinda hesitant to buy one and try it before I *think* it > may work. If your garage has power, why not just plug the access point into an outlet in the garage instead of pulling power all the way from the house? As for your 600ft limit, the cable length everyone says Ethernet has is 300 feet, but that's really to allow collision detection to work. All the documents I have found explicitly say "half-duplex segment length is 100m". They then go on to mention full-duplex links but never give a length for them :) With everything being switched nowadays, maybe the limit is really determined by signal loss. At least one person has reported success at 850 feet at 10mbit: http://groups.google.com/groups?selm=ciZoc.5141$zO3.2118@newsread2.news.atl.earthlink.net http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/ethernet.htm -- Dan Nelson dnelson@allantgroup.com