From owner-freebsd-questions@FreeBSD.ORG Fri Jul 17 19:55:25 2009 Return-Path: Delivered-To: FreeBSD-Questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 7C7F51065677 for ; Fri, 17 Jul 2009 19:55:25 +0000 (UTC) (envelope-from efinley.lists@gmail.com) Received: from mail-px0-f200.google.com (mail-px0-f200.google.com [209.85.216.200]) by mx1.freebsd.org (Postfix) with ESMTP id 4E7B48FC1E for ; Fri, 17 Jul 2009 19:55:25 +0000 (UTC) (envelope-from efinley.lists@gmail.com) Received: by pxi38 with SMTP id 38so708622pxi.3 for ; Fri, 17 Jul 2009 12:55:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=7vHZL22oIIOde1YMg9Ihqnu4L3M2yzujWsIvQIimZSk=; b=r6r9zhYlLDta9UlZ3GlaU6LdkD71s8AVlFd/hnnthgquhkkNa0KLkpC3NtAZ08+xPj 7ooCLQOq2am4ZDjmxu1WJYfonsAkGknc6Zz4k0b+FbHXr+fEtr/f469XyUOAuKT8glyy pRVgwxn1cHPKmAxL+Hnmijk7wd/BX6zkcvJvw= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=xbsg12zwJmgGlWwhx4+ulwFZmYw/9us6ayQX7IG+1TJS27/DNdR5cWx8KfhsOEWEcG GZP3wsfAA5IWAoD3ktAwvKP42fw7yxRWRpJnYryaY/zlxwMoXoc7uqmaN2F6k1VqXNZ2 V42PVGJIONfOktqEgq3XhycpUc4Sr41Ohdn2k= MIME-Version: 1.0 Received: by 10.143.33.19 with SMTP id l19mr455544wfj.154.1247858963424; Fri, 17 Jul 2009 12:29:23 -0700 (PDT) In-Reply-To: <4a602cad.8BLh4Iukknk6sHl6%perryh@pluto.rain.com> References: <20090715194718.GA16401@Grumpy.DynDNS.org> <4a602cad.8BLh4Iukknk6sHl6%perryh@pluto.rain.com> Date: Fri, 17 Jul 2009 13:29:23 -0600 Message-ID: <54e63c320907171229o3e29d0ffo9904bc3d321e01be@mail.gmail.com> From: Elliot Finley To: perryh@pluto.rain.com Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: dkelly@hiwaay.net, FreeBSD-Questions@freebsd.org Subject: Re: 5000' ethernet? 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: Fri, 17 Jul 2009 19:55:25 -0000 Just for the archives: A T1 can only run about 600 feet. Yes, that's right, 600 feet. When people talk about T1s running long distances, the reference to 'T1' is only the signalling at the end. In the middle, that "T1" will be carried by other methods such as SONET over fiber for very long distances. For the "last mile" it will be carried on HDSL or similar technology. Or if it's a fairly long copper path, it can be carried on T-carrier. But bottom line: The T1 signal that comes off of a CSU/DSU will reach about 600 feet. On Fri, Jul 17, 2009 at 1:47 AM, wrote: > David Kelly wrote: > > Not directly FreeBSD related, but how much of a chance is there > > that two machines could communicate directly over 5,000 feet of > > cat5 with no special hardware? > > After reading (at least most of) the discussion that has arisen > from this, I've had another thought which would use the wire > already ordered -- although it does involve "special hardware". > Maybe you could set up what would amount to your own two-point > telco: > > Option 1: Put a T1 frame-relay box at each end. I don't know how > far a T1 can run without a booster of some sort, but I'd think it > must be more than a mile or it would not have been commercially > feasible. > > Option 2: Put an ordinary DSL modem at one end and a DSLAM at the > other end. Again I'm not sure what the range is, but DSL used to > be referred to as the solution for "the last mile" from the telco > to the customer so it may be up to the job. > > AFAIK neither of these really needs the signal quality of Cat 5 -- > they both should work just fine over Cat 3 -- but surely the higher > grade wire can't hurt (and it may increase the usable DSL distance). > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to " > freebsd-questions-unsubscribe@freebsd.org" >