From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ww0-f47.google.com (mail-ww0-f47.google.com [74.125.82.47]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id DD03F200187 for ; Mon, 29 Aug 2011 09:29:46 -0700 (PDT) Received: by wwf4 with SMTP id 4so5380905wwf.28 for ; Mon, 29 Aug 2011 10:28:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; bh=xwnX9W3AGJuE54gVO1mIprjfEBm8xHqyxgIBV5zFfXE=; b=ZztZtQyHjli5a84dffN8UxjE/W4UOOGcZvMuZXpWc8W2g3DxIF+6DbWbcK8oHLVe2T 5t7PFsy+ogw8/DpbMGQcdwdQu0N0idbhjpOEmRggH+oespieAbAmDz2s69S/Ky7dn5FN g0Ry6OKvh3WVY2zynG5SKjT66bjSh+0zZgb3Y= MIME-Version: 1.0 Received: by 10.216.221.130 with SMTP id r2mr3824309wep.63.1314638933455; Mon, 29 Aug 2011 10:28:53 -0700 (PDT) Sender: smithbone@gmail.com Received: by 10.216.131.99 with HTTP; Mon, 29 Aug 2011 10:28:52 -0700 (PDT) In-Reply-To: References: Date: Mon, 29 Aug 2011 13:28:52 -0400 X-Google-Sender-Auth: DZILsV3MJ2cF3IpmC2cAQ55dXpM Message-ID: Subject: Re: Temp range for wndr3700 From: Richard Smith To: Dave Taht Content-Type: text/plain; charset=ISO-8859-1 Cc: bloat-devel@lists.bufferbloat.net X-BeenThere: bloat-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: "Developers working on AQM, device drivers, and networking stacks" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Aug 2011 16:29:47 -0000 On Fri, Aug 26, 2011 at 3:11 PM, Dave Taht wrote: > The nanostation M5 radios were rated to 70C, and use almost the same > chipset as in the WNDR3700. > > That said, most consumer gear (e.g the wndr3700s) I've played with > rarely survives for very long at temps higher than 40C, and I have a > long string of failed gear from other manufacturers in Nicaragua to > prove that, where the ambient temp is often well above 36C. > > The nanostations were the only thing that survived for a long time in > that environment - (well, they got taken out by rain and lightning) Thanks. I'll add those to my list of hardware to suggest to people to lookat. I think we may have a site in Jamaica that is using nanostations. > I will gladly try to come up with some way to bake the wndrs... I ask because I'd like to start recommending the wndr (or perhaps another cerowrt compatible device) to OLPC folk in response to questions about whats good choice for an AP. The big deployments seem to have their own methods of choosing and testing but lots of the smaller sites (say like with 500 or 1000 XO's) spread out over several sites don't have the ability to do good long term environmental testing prior to deployment. We spec the XO to operate fine up to 50C so I wanted to try and find a AP that would match. (even if its official ratings are not that high). Ambient at 35C is pretty common for mid-day in the summers for places that don't have any sort of air conditioning (which is 95% of them) so if the AP is closed up in a room or stuck up in some sort of attic it will easily reach >40C. The test would need more than just a short term baking. Although some sort of test in 50C ambient running heavily loaded and looking at the rise inside the case would be a good start. -- Richard A. Smith One Laptop per Child