From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ej1-x632.google.com (mail-ej1-x632.google.com [IPv6:2a00:1450:4864:20::632]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 204603B2A4 for ; Tue, 18 May 2021 12:02:55 -0400 (EDT) Received: by mail-ej1-x632.google.com with SMTP id l1so15407041ejb.6 for ; Tue, 18 May 2021 09:02:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=aM2xjxXRhMS1BMMFvmmnwINhh47mKnRk08SDX1ucejE=; b=XMlBGZLq4OQtK8Mn981TLR9Pevv9GwtircVfFzF43oHv9jzkEyr9JBf171RjnSnaPd pU/dRrB6Ofi/HJbnzhG4gyvzu+J4IuwviatqSg5fv4bEteEv1FPlA6CqW/GOJRHiNXJO f/pfRxWm0HvyWIyoHPoGdplaLLCdgnx0slo35q4iKoXdpOZYOAgFEWJaQFBHPict3mmq mQHGRPD4WVeHxvcGNHikl8KkSsRzRsdleou9cc9nXOa15rAiTXpVm1n/ufY0QMBGP6x0 i6xV8l99ubP69heSALxOkRGwjSOZhIC1rcqyb7Ka0Vm7VdLlDs7dKFwaOtqqyYiauxQq /NLw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=aM2xjxXRhMS1BMMFvmmnwINhh47mKnRk08SDX1ucejE=; b=RGCyZgfJgTsUdG2Hny9UtbfeRHrBKh3PR33eZi4y1DDlT/DTiqZkxkSiVKJk9Jv8Fe 8E+3pjrpN41ScD9MeN8/NYJnJgoS6ISI72v8/vIdu23YumyfS5tTWPzEQXjX4JFU0hbc TZ9zWq2WSaRqm7QtGJwRvBeEykU9KFGmO9PXaiiMc9iaRevjzIKOIzPIXK08p7zwFUBK ACB0A/uriXdRTtNEn/1gDOqbPAaS9wxzasbmsReU/VYhMZ2tj77adoNYDAAioB984FPg ayubbPmopKgjR+lR8Qk0FV0E1OzYj3bCB+Q8y0FC7ylTQBIy61/dFeiI9tmhK/NR/N+J Euqg== X-Gm-Message-State: AOAM532tOeAZZdpBviaBrUUo8A50nL/w4UX5AW1pEmsyCq3eioMYTjU/ TLsS+B4ZVwbkhhWqohiPSiojj/1wmDDDT/QckGs= X-Google-Smtp-Source: ABdhPJwl/v9NnLJUWFRD0APpjIHx9x10NgI6+typTTR2J/Q/885XovXUXkOP6a4lOgoU7lPP3fcxnRsWxiyLoPv6aso= X-Received: by 2002:a17:906:840c:: with SMTP id n12mr6727605ejx.431.1621353774017; Tue, 18 May 2021 09:02:54 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Aaron Wood Date: Tue, 18 May 2021 09:02:43 -0700 Message-ID: To: Bob McMahon Cc: Make-Wifi-fast Content-Type: multipart/alternative; boundary="000000000000c171be05c29cd718" Subject: Re: [Make-wifi-fast] 2.4Ghz hybrid wiring for nest protects X-BeenThere: make-wifi-fast@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 18 May 2021 16:02:55 -0000 --000000000000c171be05c29cd718 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable I've seen similar techniques used for creating isolated wifi device test labs. Each device is locked into a small RF isolation box, with bulkhead fittings for power and coax. A 2.4GHz (or 5GHz antenna, or both) is placed inside the box, and then the boxes are wired to one another in any topology that is desired. splitters of course dropping the signal in the coax, but really not much more than in the air. You might want to do some test setups with cheap isolation boxes of wire, to see how much signal you'll get through your antennas and coax. On Mon, May 17, 2021 at 11:09 AM Bob McMahon via Make-wifi-fast < make-wifi-fast@lists.bufferbloat.net> wrote: > Hi All, > > There is a historic building that has 5 floors and no fire alerting > associated with the rear fire escape ladder. I'm considering installing > nest protects in each unit near the rear egress to alert of the fire esca= pe > is compromised by fire. My guess is floor to floor wireless communication= s > may not work too well. > > I'm thinking about cleaning up the communications runs in the rear of the > building. The cable company did a shoddy job of hanging cable for TV > services in the 80s. It seems a good time to add communications conduit a= nd > run more modern cabling. > > As part of this, I'm considering running LMR 600 cabling on the exterior > brick wall to act as 2.4Ghz communications wave guides. I was thinking ma= ke > a loop but break the loop at each floor with a 2.4Ghz wilkinson power > divider > . > Then bore a hole into each unit and install a 2.4Ghz patch antenna > > pm each rear interior wall. Each unit would then install a Nest protect o= n > the ceiling from the patch antenna. The ring or loop topology I think giv= es > a bit of redundancy. > > Thoughts on if this would achieve the goals of supporting nest protect > communications for such a building? > > Bob > > > > > This electronic communication and the information and any files > transmitted with it, or attached to it, are confidential and are intended > solely for the use of the individual or entity to whom it is addressed an= d > may contain information that is confidential, legally privileged, protect= ed > by privacy laws, or otherwise restricted from disclosure to anyone else. = If > you are not the intended recipient or the person responsible for deliveri= ng > the e-mail to the intended recipient, you are hereby notified that any us= e, > copying, distributing, dissemination, forwarding, printing, or copying of > this e-mail is strictly prohibited. If you received this e-mail in error, > please return the e-mail to the sender, delete it from your computer, and > destroy any printed copy of it. > _______________________________________________ > Make-wifi-fast mailing list > Make-wifi-fast@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/make-wifi-fast --000000000000c171be05c29cd718 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
I've seen similar techniques used for creating isolate= d wifi device test labs.=C2=A0 Each device is locked into a small RF isolat= ion box, with bulkhead fittings for power and coax.=C2=A0 A 2.4GHz (or 5GHz= antenna, or both) is placed inside the box, and then the boxes are wired t= o one another in any topology that is desired. =C2=A0splitters of course dr= opping the signal in the coax, but really not much more than in the air.
You might want to do some test setups with cheap isolation= boxes of wire, to see how much signal you'll get through your antennas= and coax.

On Mon, May 17, 2021 at 11:09 AM Bob McMahon via Make-wifi-= fast <make-wifi-= fast@lists.bufferbloat.net> wrote:
Hi All,

There is a historic building that has 5 floor= s and no fire alerting associated with the rear fire escape ladder. I'm= considering installing nest protects in each unit near the rear egress to = alert of the=C2=A0fire escape is compromised=C2=A0by fire. My guess is floo= r to floor wireless communications may not work too well.

I'm thinking about cleaning up the communications runs in the r= ear of the building. The cable company did a shoddy job of hanging cable fo= r TV services in the 80s. It seems a good time to add communications condui= t and run more modern cabling.

As part of this, I'm considering = running LMR 600 cabling on the exterior brick wall to act as 2.4Ghz communi= cations wave guides. I was thinking make a loop but break the loop at each = floor with a 2.4Ghz wilkinson power divider<= /a>. Then bore a hole into each unit and install a 2.4Ghz patch antenna pm each rear interior wall. Each unit would th= en install a Nest protect on the ceiling from the patch antenna. The=C2=A0r= ing or loop topology I think gives a bit of redundancy.

Thoughts on = if this would achieve the goals of supporting nest protect communications f= or such a building?

Bob




This ele= ctronic communication and the information and any files transmitted with it= , or attached to it, are confidential and are intended solely for the use o= f the individual or entity to whom it is addressed and may contain informat= ion that is confidential, legally privileged, protected by privacy laws, or= otherwise restricted from disclosure to anyone else. If you are not the in= tended recipient or the person responsible for delivering the e-mail to the= intended recipient, you are hereby notified that any use, copying, distrib= uting, dissemination, forwarding, printing, or copying of this e-mail is st= rictly prohibited. If you received this e-mail in error, please return the = e-mail to the sender, delete it from your computer, and destroy any printed= copy of it._______________________________________________ Make-wifi-fast mailing list
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