Re: [WIRELESS-LAN] Wifi blocking paint?
This product looks interesting: http://www.slt.co/products/RFShieldingPaint/ShieldingPaint-YShield-HSF54.aspx ~Jeff From: EDUCAUSE Listserv on behalf of "Eric T. Barnett" Reply-To: EDUCAUSE Listserv Date: Monday, February 20, 2017 at 10:42 AM To: EDUCAUSE Listserv Subject: Re: [WIRELESS-LAN] Wifi blocking paint? Try hexagonal chicken wire. They used that to put up plaster in old buildings and it will flat kill a wireless signal. I’ve also seen sand placed in the voids of concrete block (for sound dampening in an old Fine Arts building) kill a signal pretty dead too. --Eric From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Sweetser, Frank E Sent: Sunday, February 19, 2017 1:32 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Wifi blocking paint? I'm definitely going to try for some guidelines like that, especially around power levels - but honestly, if they knew what they were doing they wouldn't be taking the course [�] I'd just rather have some extra measures in place for when someone accidentally sets max power level on channel 3. Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken From: The EDUCAUSE Wireless Issues Constituent Group Listserv on behalf of GT Hill Sent: Sunday, February 19, 2017 2:22 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Wifi blocking paint? Frank, Maybe you just have certain channels assigned for the students to use? Make an AP group of just the APs around the room and exclude certain channels that are designated for educational use? GT From: The EDUCAUSE Wireless Issues Constituent Group Listserv mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> on behalf of "Sweetser, Frank E" mailto:f...@wpi.edu>> Reply-To: The EDUCAUSE Wireless Issues Constituent Group Listserv mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> Date: Sunday, February 19, 2017 at 1:16 PM To: mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> Subject: Re: [WIRELESS-LAN] Wifi blocking paint? Unfortunately it's nothing that flexible. From what little I've heard, one of our departments is going to start offering a basic wifi certification course, so it's basically going to be a room full of students setting up wireless networks for the first time. Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken From: The EDUCAUSE Wireless Issues Constituent Group Listserv mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> on behalf of Mike King mailto:m...@mpking.com>> Sent: Sunday, February 19, 2017 11:00 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: Re: [WIRELESS-LAN] Wifi blocking paint? Frank, I'm not sure what your program is trying to accomplish, but I have had in a program in the past utilizing an ixia veriwave. https://www.ixiacom.com/products/ixveriwave<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ixiacom.com_products_ixveriwave&d=DwMGaQ&c=imBPVzF25OnBgGmVOlcsiEgHoG1i6YHLR0Sj_gZ4adc&r=cgTxo-On3rDqUgBJAQY2jxXj-ytsfsQM44cHcSOttfI&m=al6cBKjb30o-scv3OEsIzw4DEcBBS4BDMGH-FUPfJYs&s=a6RB0Hez6OLvIJfc2tw48fuP77ttL0s2TsEC4dAANdA&e=> Essential it's all based around Faraday Cages, and specialized equipment to monitor, modulate, and generate RF signals in a closed enviorment. The upfront cost is pricey, but how pricey is some of the building modifications we've discussed, as well as long term effectiveness. One of the really nice things about the Veriwave setup was the everything was repeatable. On Thu, Feb 16, 2017 at 8:24 PM, Sweetser, Frank E mailto:f...@wpi.edu>> wrote: I don't know that the demand for blocking is significant enough to justify a consultant, but I'm certainly going to float the idea. If that doesn't happen, though, the yshield paint recommendation (along with basic ideas, like making sure they keep their power levels down low) should at least give me some best effort protection. thanks! Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken From: The EDUCAUSE Wireless Issues Constituent Group Listserv mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> on behalf of Chuck Enfield mailto:chu...@psu.edu>> Sent: Thursday, February 16, 2017 4:51 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: Re: [WIRELESS
RE: [WIRELESS-LAN] Wifi blocking paint?
Try hexagonal chicken wire. They used that to put up plaster in old buildings and it will flat kill a wireless signal. I’ve also seen sand placed in the voids of concrete block (for sound dampening in an old Fine Arts building) kill a signal pretty dead too. --Eric From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Sweetser, Frank E Sent: Sunday, February 19, 2017 1:32 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Wifi blocking paint? I'm definitely going to try for some guidelines like that, especially around power levels - but honestly, if they knew what they were doing they wouldn't be taking the course [😉] I'd just rather have some extra measures in place for when someone accidentally sets max power level on channel 3. Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken From: The EDUCAUSE Wireless Issues Constituent Group Listserv on behalf of GT Hill Sent: Sunday, February 19, 2017 2:22 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Wifi blocking paint? Frank, Maybe you just have certain channels assigned for the students to use? Make an AP group of just the APs around the room and exclude certain channels that are designated for educational use? GT From: The EDUCAUSE Wireless Issues Constituent Group Listserv mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> on behalf of "Sweetser, Frank E" mailto:f...@wpi.edu>> Reply-To: The EDUCAUSE Wireless Issues Constituent Group Listserv mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> Date: Sunday, February 19, 2017 at 1:16 PM To: mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> Subject: Re: [WIRELESS-LAN] Wifi blocking paint? Unfortunately it's nothing that flexible. From what little I've heard, one of our departments is going to start offering a basic wifi certification course, so it's basically going to be a room full of students setting up wireless networks for the first time. Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken From: The EDUCAUSE Wireless Issues Constituent Group Listserv mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> on behalf of Mike King mailto:m...@mpking.com>> Sent: Sunday, February 19, 2017 11:00 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: Re: [WIRELESS-LAN] Wifi blocking paint? Frank, I'm not sure what your program is trying to accomplish, but I have had in a program in the past utilizing an ixia veriwave. https://www.ixiacom.com/products/ixveriwave Essential it's all based around Faraday Cages, and specialized equipment to monitor, modulate, and generate RF signals in a closed enviorment. The upfront cost is pricey, but how pricey is some of the building modifications we've discussed, as well as long term effectiveness. One of the really nice things about the Veriwave setup was the everything was repeatable. On Thu, Feb 16, 2017 at 8:24 PM, Sweetser, Frank E mailto:f...@wpi.edu>> wrote: I don't know that the demand for blocking is significant enough to justify a consultant, but I'm certainly going to float the idea. If that doesn't happen, though, the yshield paint recommendation (along with basic ideas, like making sure they keep their power levels down low) should at least give me some best effort protection. thanks! Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken From: The EDUCAUSE Wireless Issues Constituent Group Listserv mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> on behalf of Chuck Enfield mailto:chu...@psu.edu>> Sent: Thursday, February 16, 2017 4:51 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: Re: [WIRELESS-LAN] Wifi blocking paint? If the lab needs to be completely isolated you’re going to want to hire a consultant to design a shielding system. If you just need enough attenuation to mitigate significant interference, I’ve heard good things about the yshield paint. You can add about 30-40dB of loss to a wall. If you can keep your radios 40-50 feet apart, this should isolate them from each other enough that they disappear into the noise floor. Keep in mind that it has to be grounded for maximum effect, and if I’m skeptical about the efficacy of the paint it’s mostly to do with this. Good bonding and grounding is hard, and carbon paint d
Re: [WIRELESS-LAN] Wifi blocking paint?
I'm definitely going to try for some guidelines like that, especially around power levels - but honestly, if they knew what they were doing they wouldn't be taking the course [😉] I'd just rather have some extra measures in place for when someone accidentally sets max power level on channel 3. Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken From: The EDUCAUSE Wireless Issues Constituent Group Listserv on behalf of GT Hill Sent: Sunday, February 19, 2017 2:22 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Wifi blocking paint? Frank, Maybe you just have certain channels assigned for the students to use? Make an AP group of just the APs around the room and exclude certain channels that are designated for educational use? GT From: The EDUCAUSE Wireless Issues Constituent Group Listserv mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> on behalf of "Sweetser, Frank E" mailto:f...@wpi.edu>> Reply-To: The EDUCAUSE Wireless Issues Constituent Group Listserv mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> Date: Sunday, February 19, 2017 at 1:16 PM To: mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> Subject: Re: [WIRELESS-LAN] Wifi blocking paint? Unfortunately it's nothing that flexible. From what little I've heard, one of our departments is going to start offering a basic wifi certification course, so it's basically going to be a room full of students setting up wireless networks for the first time. Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken From: The EDUCAUSE Wireless Issues Constituent Group Listserv mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> on behalf of Mike King mailto:m...@mpking.com>> Sent: Sunday, February 19, 2017 11:00 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: Re: [WIRELESS-LAN] Wifi blocking paint? Frank, I'm not sure what your program is trying to accomplish, but I have had in a program in the past utilizing an ixia veriwave. https://www.ixiacom.com/products/ixveriwave Essential it's all based around Faraday Cages, and specialized equipment to monitor, modulate, and generate RF signals in a closed enviorment. The upfront cost is pricey, but how pricey is some of the building modifications we've discussed, as well as long term effectiveness. One of the really nice things about the Veriwave setup was the everything was repeatable. On Thu, Feb 16, 2017 at 8:24 PM, Sweetser, Frank E mailto:f...@wpi.edu>> wrote: I don't know that the demand for blocking is significant enough to justify a consultant, but I'm certainly going to float the idea. If that doesn't happen, though, the yshield paint recommendation (along with basic ideas, like making sure they keep their power levels down low) should at least give me some best effort protection. thanks! Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken From: The EDUCAUSE Wireless Issues Constituent Group Listserv mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> on behalf of Chuck Enfield mailto:chu...@psu.edu>> Sent: Thursday, February 16, 2017 4:51 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: Re: [WIRELESS-LAN] Wifi blocking paint? If the lab needs to be completely isolated you’re going to want to hire a consultant to design a shielding system. If you just need enough attenuation to mitigate significant interference, I’ve heard good things about the yshield paint. You can add about 30-40dB of loss to a wall. If you can keep your radios 40-50 feet apart, this should isolate them from each other enough that they disappear into the noise floor. Keep in mind that it has to be grounded for maximum effect, and if I’m skeptical about the efficacy of the paint it’s mostly to do with this. Good bonding and grounding is hard, and carbon paint doesn’t strike me as a great medium for reliable bonding. That said, at Wi-Fi wavelengths ground quality shouldn’t be too much of a factor in attenuation as long as you keep antenna elements far enough from the walls to avoid near field effects. But if the grounding isn’t effective you could end up with excessive internal reflection in the lab. No problem if there’s a normal amount of absorptive material in the room, but could be a problem otherwise. Just my two cents. Chuck From: The EDUCAUSE Wireless Issues Const
Re: [WIRELESS-LAN] Wifi blocking paint?
Frank, Maybe you just have certain channels assigned for the students to use? Make an AP group of just the APs around the room and exclude certain channels that are designated for educational use? GT From: The EDUCAUSE Wireless Issues Constituent Group Listserv on behalf of "Sweetser, Frank E" Reply-To: The EDUCAUSE Wireless Issues Constituent Group Listserv Date: Sunday, February 19, 2017 at 1:16 PM To: Subject: Re: [WIRELESS-LAN] Wifi blocking paint? Unfortunately it's nothing that flexible. From what little I've heard, one of our departments is going to start offering a basic wifi certification course, so it's basically going to be a room full of students setting up wireless networks for the first time. Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken From: The EDUCAUSE Wireless Issues Constituent Group Listserv on behalf of Mike King Sent: Sunday, February 19, 2017 11:00 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Wifi blocking paint? Frank, I'm not sure what your program is trying to accomplish, but I have had in a program in the past utilizing an ixia veriwave. https://www.ixiacom.com/products/ixveriwave Essential it's all based around Faraday Cages, and specialized equipment to monitor, modulate, and generate RF signals in a closed enviorment. The upfront cost is pricey, but how pricey is some of the building modifications we've discussed, as well as long term effectiveness. One of the really nice things about the Veriwave setup was the everything was repeatable. On Thu, Feb 16, 2017 at 8:24 PM, Sweetser, Frank E wrote: I don't know that the demand for blocking is significant enough to justify a consultant, but I'm certainly going to float the idea. If that doesn't happen, though, the yshield paint recommendation (along with basic ideas, like making sure they keep their power levels down low) should at least give me some best effort protection. thanks! Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken From: The EDUCAUSE Wireless Issues Constituent Group Listserv on behalf of Chuck Enfield Sent: Thursday, February 16, 2017 4:51 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Wifi blocking paint? If the lab needs to be completely isolated you’re going to want to hire a consultant to design a shielding system. If you just need enough attenuation to mitigate significant interference, I’ve heard good things about the yshield paint. You can add about 30-40dB of loss to a wall. If you can keep your radios 40-50 feet apart, this should isolate them from each other enough that they disappear into the noise floor. Keep in mind that it has to be grounded for maximum effect, and if I’m skeptical about the efficacy of the paint it’s mostly to do with this. Good bonding and grounding is hard, and carbon paint doesn’t strike me as a great medium for reliable bonding. That said, at Wi-Fi wavelengths ground quality shouldn’t be too much of a factor in attenuation as long as you keep antenna elements far enough from the walls to avoid near field effects. But if the grounding isn’t effective you could end up with excessive internal reflection in the lab. No problem if there’s a normal amount of absorptive material in the room, but could be a problem otherwise. Just my two cents. Chuck From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Sweetser, Frank E Sent: Thursday, February 16, 2017 3:27 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Wifi blocking paint? Hi all, we just got word that a professor here wants to start running a certificate program around a wireless lab setup. To mitigate any potential problems from this, we'd like to try to isolate the lab wireless to the one room as much possible. Does anyone have any recommendations for wifi blocking paint, or other building material choices and techniques? thanks! Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educau
Re: [WIRELESS-LAN] Wifi blocking paint?
Unfortunately it's nothing that flexible. From what little I've heard, one of our departments is going to start offering a basic wifi certification course, so it's basically going to be a room full of students setting up wireless networks for the first time. Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken From: The EDUCAUSE Wireless Issues Constituent Group Listserv on behalf of Mike King Sent: Sunday, February 19, 2017 11:00 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Wifi blocking paint? Frank, I'm not sure what your program is trying to accomplish, but I have had in a program in the past utilizing an ixia veriwave. https://www.ixiacom.com/products/ixveriwave Essential it's all based around Faraday Cages, and specialized equipment to monitor, modulate, and generate RF signals in a closed enviorment. The upfront cost is pricey, but how pricey is some of the building modifications we've discussed, as well as long term effectiveness. One of the really nice things about the Veriwave setup was the everything was repeatable. On Thu, Feb 16, 2017 at 8:24 PM, Sweetser, Frank E mailto:f...@wpi.edu>> wrote: I don't know that the demand for blocking is significant enough to justify a consultant, but I'm certainly going to float the idea. If that doesn't happen, though, the yshield paint recommendation (along with basic ideas, like making sure they keep their power levels down low) should at least give me some best effort protection. thanks! Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken From: The EDUCAUSE Wireless Issues Constituent Group Listserv mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> on behalf of Chuck Enfield mailto:chu...@psu.edu>> Sent: Thursday, February 16, 2017 4:51 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: Re: [WIRELESS-LAN] Wifi blocking paint? If the lab needs to be completely isolated you’re going to want to hire a consultant to design a shielding system. If you just need enough attenuation to mitigate significant interference, I’ve heard good things about the yshield paint. You can add about 30-40dB of loss to a wall. If you can keep your radios 40-50 feet apart, this should isolate them from each other enough that they disappear into the noise floor. Keep in mind that it has to be grounded for maximum effect, and if I’m skeptical about the efficacy of the paint it’s mostly to do with this. Good bonding and grounding is hard, and carbon paint doesn’t strike me as a great medium for reliable bonding. That said, at Wi-Fi wavelengths ground quality shouldn’t be too much of a factor in attenuation as long as you keep antenna elements far enough from the walls to avoid near field effects. But if the grounding isn’t effective you could end up with excessive internal reflection in the lab. No problem if there’s a normal amount of absorptive material in the room, but could be a problem otherwise. Just my two cents. Chuck From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>] On Behalf Of Sweetser, Frank E Sent: Thursday, February 16, 2017 3:27 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: [WIRELESS-LAN] Wifi blocking paint? Hi all, we just got word that a professor here wants to start running a certificate program around a wireless lab setup. To mitigate any potential problems from this, we'd like to try to isolate the lab wireless to the one room as much possible. Does anyone have any recommendations for wifi blocking paint, or other building material choices and techniques? thanks! Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ***
Re: [WIRELESS-LAN] Wifi blocking paint?
I've been to many device manufacturers and they use RF chambers for a lot do their testing. There are also some pesky compliance things that it enables you to get around. Sent from my iPhone > On Feb 19, 2017, at 9:00 AM, Mike King wrote: > > Frank, > > I'm not sure what your program is trying to accomplish, but I have had in a > program in the past utilizing an ixia veriwave. > https://www.ixiacom.com/products/ixveriwave > > Essential it's all based around Faraday Cages, and specialized equipment to > monitor, modulate, and generate RF signals in a closed enviorment. > > The upfront cost is pricey, but how pricey is some of the building > modifications we've discussed, as well as long term effectiveness. > > One of the really nice things about the Veriwave setup was the everything was > repeatable. > > > > > >> On Thu, Feb 16, 2017 at 8:24 PM, Sweetser, Frank E wrote: >> I don't know that the demand for blocking is significant enough to justify a >> consultant, but I'm certainly going to float the idea. If that doesn't >> happen, though, the yshield paint recommendation (along with basic ideas, >> like making sure they keep their power levels down low) should at least give >> me some best effort protection. >> >> >> thanks! >> >> >> Frank Sweetser >> Director of Network Operations >> Worcester Polytechnic Institute >> "For every problem, there is a solution that is simple, elegant, and wrong." >> - HL Mencken >> >> >> From: The EDUCAUSE Wireless Issues Constituent Group Listserv >> on behalf of Chuck Enfield >> >> Sent: Thursday, February 16, 2017 4:51 PM >> To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU >> Subject: Re: [WIRELESS-LAN] Wifi blocking paint? >> >> If the lab needs to be completely isolated you’re going to want to hire a >> consultant to design a shielding system. If you just need enough >> attenuation to mitigate significant interference, I’ve heard good things >> about the yshield paint. You can add about 30-40dB of loss to a wall. If >> you can keep your radios 40-50 feet apart, this should isolate them from >> each other enough that they disappear into the noise floor. >> >> Keep in mind that it has to be grounded for maximum effect, and if I’m >> skeptical about the efficacy of the paint it’s mostly to do with this. Good >> bonding and grounding is hard, and carbon paint doesn’t strike me as a great >> medium for reliable bonding. That said, at Wi-Fi wavelengths ground quality >> shouldn’t be too much of a factor in attenuation as long as you keep antenna >> elements far enough from the walls to avoid near field effects. But if the >> grounding isn’t effective you could end up with excessive internal >> reflection in the lab. No problem if there’s a normal amount of absorptive >> material in the room, but could be a problem otherwise. >> >> Just my two cents. >> >> Chuck >> >> From: The EDUCAUSE Wireless Issues Constituent Group Listserv >> [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Sweetser, Frank E >> Sent: Thursday, February 16, 2017 3:27 PM >> To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU >> Subject: [WIRELESS-LAN] Wifi blocking paint? >> >> >> >> Hi all, >> >> >> >> we just got word that a professor here wants to start running a certificate >> program around a wireless lab setup. To mitigate any potential problems >> from this, we'd like to try to isolate the lab wireless to the one room as >> much possible. Does anyone have any recommendations for wifi blocking >> paint, or other building material choices and techniques? >> >> >> >> thanks! >> >> >> >> Frank Sweetser >> Director of Network Operations >> Worcester Polytechnic Institute >> "For every problem, there is a solution that is simple, elegant, and wrong." >> - HL Mencken >> ** Participation and subscription information for this EDUCAUSE >> Constituent Group discussion list can be found at >> http://www.educause.edu/discuss. >> ** Participation and subscription information for this EDUCAUSE >> Constituent Group discussion list can be found at >> http://www.educause.edu/discuss. >> ** Participation and subscription information for this EDUCAUSE >> Constituent Group discussion list can be found at >> http://www.educause.edu/discuss. > > ** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/discuss. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss.
Re: [WIRELESS-LAN] Wifi blocking paint?
Frank, I'm not sure what your program is trying to accomplish, but I have had in a program in the past utilizing an ixia veriwave. https://www.ixiacom.com/products/ixveriwave Essential it's all based around Faraday Cages, and specialized equipment to monitor, modulate, and generate RF signals in a closed enviorment. The upfront cost is pricey, but how pricey is some of the building modifications we've discussed, as well as long term effectiveness. One of the really nice things about the Veriwave setup was the everything was repeatable. On Thu, Feb 16, 2017 at 8:24 PM, Sweetser, Frank E wrote: > I don't know that the demand for blocking is significant enough to justify > a consultant, but I'm certainly going to float the idea. If that doesn't > happen, though, the yshield paint recommendation (along with basic ideas, > like making sure they keep their power levels down low) should at least > give me some best effort protection. > > > thanks! > > > Frank Sweetser > Director of Network Operations > Worcester Polytechnic Institute > "For every problem, there is a solution that is simple, elegant, and > wrong." - HL Mencken > > > -- > *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv < > WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> on behalf of Chuck Enfield < > chu...@psu.edu> > *Sent:* Thursday, February 16, 2017 4:51 PM > *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > *Subject:* Re: [WIRELESS-LAN] Wifi blocking paint? > > > If the lab needs to be completely isolated you’re going to want to hire a > consultant to design a shielding system. If you just need enough > attenuation to mitigate significant interference, I’ve heard good things > about the yshield paint. You can add about 30-40dB of loss to a wall. If > you can keep your radios 40-50 feet apart, this should isolate them from > each other enough that they disappear into the noise floor. > > > > Keep in mind that it has to be grounded for maximum effect, and if I’m > skeptical about the efficacy of the paint it’s mostly to do with this. > Good bonding and grounding is hard, and carbon paint doesn’t strike me as a > great medium for reliable bonding. That said, at Wi-Fi wavelengths ground > quality shouldn’t be too much of a factor in attenuation as long as you > keep antenna elements far enough from the walls to avoid near field > effects. But if the grounding isn’t effective you could end up with > excessive internal reflection in the lab. No problem if there’s a normal > amount of absorptive material in the room, but could be a problem otherwise. > > > > Just my two cents. > > > > Chuck > > > > *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto: > WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Sweetser, Frank E > *Sent:* Thursday, February 16, 2017 3:27 PM > *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > *Subject:* [WIRELESS-LAN] Wifi blocking paint? > > > > > > Hi all, > > > > we just got word that a professor here wants to start running a > certificate program around a wireless lab setup. To mitigate any potential > problems from this, we'd like to try to isolate the lab wireless to the one > room as much possible. Does anyone have any recommendations for wifi > blocking paint, or other building material choices and techniques? > > > > thanks! > > > > Frank Sweetser > Director of Network Operations > Worcester Polytechnic Institute > "For every problem, there is a solution that is simple, elegant, and > wrong." - HL Mencken > > ** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at http://www.educause.edu/ > discuss. > ** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at http://www.educause.edu/ > discuss. > > ** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at http://www.educause.edu/ > discuss. > > ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss.
Re: [WIRELESS-LAN] Wifi blocking paint?
I don't know that the demand for blocking is significant enough to justify a consultant, but I'm certainly going to float the idea. If that doesn't happen, though, the yshield paint recommendation (along with basic ideas, like making sure they keep their power levels down low) should at least give me some best effort protection. thanks! Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken From: The EDUCAUSE Wireless Issues Constituent Group Listserv on behalf of Chuck Enfield Sent: Thursday, February 16, 2017 4:51 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Wifi blocking paint? If the lab needs to be completely isolated you’re going to want to hire a consultant to design a shielding system. If you just need enough attenuation to mitigate significant interference, I’ve heard good things about the yshield paint. You can add about 30-40dB of loss to a wall. If you can keep your radios 40-50 feet apart, this should isolate them from each other enough that they disappear into the noise floor. Keep in mind that it has to be grounded for maximum effect, and if I’m skeptical about the efficacy of the paint it’s mostly to do with this. Good bonding and grounding is hard, and carbon paint doesn’t strike me as a great medium for reliable bonding. That said, at Wi-Fi wavelengths ground quality shouldn’t be too much of a factor in attenuation as long as you keep antenna elements far enough from the walls to avoid near field effects. But if the grounding isn’t effective you could end up with excessive internal reflection in the lab. No problem if there’s a normal amount of absorptive material in the room, but could be a problem otherwise. Just my two cents. Chuck From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Sweetser, Frank E Sent: Thursday, February 16, 2017 3:27 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Wifi blocking paint? Hi all, we just got word that a professor here wants to start running a certificate program around a wireless lab setup. To mitigate any potential problems from this, we'd like to try to isolate the lab wireless to the one room as much possible. Does anyone have any recommendations for wifi blocking paint, or other building material choices and techniques? thanks! Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss.
Re: [WIRELESS-LAN] Wifi blocking paint?
Luckily there's mostly roof above this particular room, so there's minimal population there. As for below, the room was literally built on top of a (now decommissioned) training nuclear reactor, so I think it's safe to say that it's already better shielded than any paint I can find =) Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken From: The EDUCAUSE Wireless Issues Constituent Group Listserv on behalf of Robert Owens Sent: Thursday, February 16, 2017 4:58 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Wifi blocking paint? Keep in mind that RF goes up and down as well. If this is a multistory building shielding has to be considered for floor and ceiling as well as walls. From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Chuck Enfield Sent: Thursday, February 16, 2017 3:52 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Wifi blocking paint? If the lab needs to be completely isolated you’re going to want to hire a consultant to design a shielding system. If you just need enough attenuation to mitigate significant interference, I’ve heard good things about the yshield paint. You can add about 30-40dB of loss to a wall. If you can keep your radios 40-50 feet apart, this should isolate them from each other enough that they disappear into the noise floor. Keep in mind that it has to be grounded for maximum effect, and if I’m skeptical about the efficacy of the paint it’s mostly to do with this. Good bonding and grounding is hard, and carbon paint doesn’t strike me as a great medium for reliable bonding. That said, at Wi-Fi wavelengths ground quality shouldn’t be too much of a factor in attenuation as long as you keep antenna elements far enough from the walls to avoid near field effects. But if the grounding isn’t effective you could end up with excessive internal reflection in the lab. No problem if there’s a normal amount of absorptive material in the room, but could be a problem otherwise. Just my two cents. Chuck From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Sweetser, Frank E Sent: Thursday, February 16, 2017 3:27 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: [WIRELESS-LAN] Wifi blocking paint? Hi all, we just got word that a professor here wants to start running a certificate program around a wireless lab setup. To mitigate any potential problems from this, we'd like to try to isolate the lab wireless to the one room as much possible. Does anyone have any recommendations for wifi blocking paint, or other building material choices and techniques? thanks! Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss.
Re: [WIRELESS-LAN] Wifi blocking paint?
Wire mesh also forms a nice barrier. My school had high end glass doors with wire woven through it. Guess what happened when you shut the doors? Very functional Faraday Cage. I have also seen thin Guage wire used to reinforce horsehair plaster walls block wifi signal. Ian Get Outlook for Android From: The EDUCAUSE Wireless Issues Constituent Group Listserv on behalf of Samuel Clements Sent: Thursday, February 16, 2017 6:00:04 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Wifi blocking paint? Also of concern are the following two items: 1) Have you seen a microwave oven leak? Even the smallest unprotected space in your barrier can 'leak' energy. 2) Be cautious about un-intentionally blocking cell phone service at the same time. I think there is a grey area at least in the states about impeding licensed frequencies without an FCC exemption. Heck - you may want them to engage the FCC before you do anything and file for an exemption now that I think on it. -Sam On Thu, Feb 16, 2017 at 4:31 PM, Chuck Enfield mailto:chu...@psu.edu>> wrote: BTW, if the concern is preventing activities in the lab from fouling up the institution’s Wi-Fi outside, using AP models with external antennas and pads could be sufficient. You should be able to get 30dB pads for $50-$100 each. If the room has bock walls that should be sufficient. From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>] On Behalf Of Chuck Enfield Sent: Thursday, February 16, 2017 4:52 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: Re: [WIRELESS-LAN] Wifi blocking paint? If the lab needs to be completely isolated you’re going to want to hire a consultant to design a shielding system. If you just need enough attenuation to mitigate significant interference, I’ve heard good things about the yshield paint. You can add about 30-40dB of loss to a wall. If you can keep your radios 40-50 feet apart, this should isolate them from each other enough that they disappear into the noise floor. Keep in mind that it has to be grounded for maximum effect, and if I’m skeptical about the efficacy of the paint it’s mostly to do with this. Good bonding and grounding is hard, and carbon paint doesn’t strike me as a great medium for reliable bonding. That said, at Wi-Fi wavelengths ground quality shouldn’t be too much of a factor in attenuation as long as you keep antenna elements far enough from the walls to avoid near field effects. But if the grounding isn’t effective you could end up with excessive internal reflection in the lab. No problem if there’s a normal amount of absorptive material in the room, but could be a problem otherwise. Just my two cents. Chuck From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>] On Behalf Of Sweetser, Frank E Sent: Thursday, February 16, 2017 3:27 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: [WIRELESS-LAN] Wifi blocking paint? Hi all, we just got word that a professor here wants to start running a certificate program around a wireless lab setup. To mitigate any potential problems from this, we'd like to try to isolate the lab wireless to the one room as much possible. Does anyone have any recommendations for wifi blocking paint, or other building material choices and techniques? thanks! Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.educause.edu%2Fdiscuss&data=02%7C01%7Cilyons%40ROLLINS.EDU%7C104907ec3a084fed5c3c08d456bf9130%7Cb8e8d71a947d41dd81dd8401dcc51007%7C0%7C0%7C636228828176089143&sdata=IaIaIRHJa3%2FNpwOhNBhYwVUEyHZc5w2HDCfip8xzlKM%3D&reserved=0>. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.educause.edu%2Fdiscuss&data=02%7C01%7Cilyons%40ROLLINS.EDU%7C104907ec3a084fed5c3c08d456bf9130%7Cb8e8d71a947d41dd81dd8401dcc51007%7C0%7C0%7C636228828176089143&sdata=IaIaIRHJa3%2FNpwOhNBhYwVUEyHZc5w2HDCfip8xzlKM%3D&reserved=0>. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss<https://na01.safelinks.protectio
Re: [WIRELESS-LAN] Wifi blocking paint?
Also of concern are the following two items: 1) Have you seen a microwave oven leak? Even the smallest unprotected space in your barrier can 'leak' energy. 2) Be cautious about un-intentionally blocking cell phone service at the same time. I think there is a grey area at least in the states about impeding licensed frequencies without an FCC exemption. Heck - you may want them to engage the FCC before you do anything and file for an exemption now that I think on it. -Sam On Thu, Feb 16, 2017 at 4:31 PM, Chuck Enfield wrote: > BTW, if the concern is preventing activities in the lab from fouling up > the institution’s Wi-Fi outside, using AP models with external antennas and > pads could be sufficient. You should be able to get 30dB pads for $50-$100 > each. If the room has bock walls that should be sufficient. > > > > *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto: > WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Chuck Enfield > *Sent:* Thursday, February 16, 2017 4:52 PM > *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > *Subject:* Re: [WIRELESS-LAN] Wifi blocking paint? > > > > If the lab needs to be completely isolated you’re going to want to hire a > consultant to design a shielding system. If you just need enough > attenuation to mitigate significant interference, I’ve heard good things > about the yshield paint. You can add about 30-40dB of loss to a wall. If > you can keep your radios 40-50 feet apart, this should isolate them from > each other enough that they disappear into the noise floor. > > > > Keep in mind that it has to be grounded for maximum effect, and if I’m > skeptical about the efficacy of the paint it’s mostly to do with this. > Good bonding and grounding is hard, and carbon paint doesn’t strike me as a > great medium for reliable bonding. That said, at Wi-Fi wavelengths ground > quality shouldn’t be too much of a factor in attenuation as long as you > keep antenna elements far enough from the walls to avoid near field > effects. But if the grounding isn’t effective you could end up with > excessive internal reflection in the lab. No problem if there’s a normal > amount of absorptive material in the room, but could be a problem otherwise. > > > > Just my two cents. > > > > Chuck > > > > *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto: > WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Sweetser, Frank E > *Sent:* Thursday, February 16, 2017 3:27 PM > *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > *Subject:* [WIRELESS-LAN] Wifi blocking paint? > > > > > > Hi all, > > > > we just got word that a professor here wants to start running a > certificate program around a wireless lab setup. To mitigate any potential > problems from this, we'd like to try to isolate the lab wireless to the one > room as much possible. Does anyone have any recommendations for wifi > blocking paint, or other building material choices and techniques? > > > > thanks! > > > > Frank Sweetser > Director of Network Operations > Worcester Polytechnic Institute > "For every problem, there is a solution that is simple, elegant, and > wrong." - HL Mencken > > ** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at http://www.educause.edu/ > discuss. > > ** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at http://www.educause.edu/ > discuss. > ** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at http://www.educause.edu/ > discuss. > > ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss.
RE: [WIRELESS-LAN] Wifi blocking paint?
BTW, if the concern is preventing activities in the lab from fouling up the institution's Wi-Fi outside, using AP models with external antennas and pads could be sufficient. You should be able to get 30dB pads for $50-$100 each. If the room has bock walls that should be sufficient. From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Chuck Enfield Sent: Thursday, February 16, 2017 4:52 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Wifi blocking paint? If the lab needs to be completely isolated you're going to want to hire a consultant to design a shielding system. If you just need enough attenuation to mitigate significant interference, I've heard good things about the yshield paint. You can add about 30-40dB of loss to a wall. If you can keep your radios 40-50 feet apart, this should isolate them from each other enough that they disappear into the noise floor. Keep in mind that it has to be grounded for maximum effect, and if I'm skeptical about the efficacy of the paint it's mostly to do with this. Good bonding and grounding is hard, and carbon paint doesn't strike me as a great medium for reliable bonding. That said, at Wi-Fi wavelengths ground quality shouldn't be too much of a factor in attenuation as long as you keep antenna elements far enough from the walls to avoid near field effects. But if the grounding isn't effective you could end up with excessive internal reflection in the lab. No problem if there's a normal amount of absorptive material in the room, but could be a problem otherwise. Just my two cents. Chuck From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Sweetser, Frank E Sent: Thursday, February 16, 2017 3:27 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Wifi blocking paint? Hi all, we just got word that a professor here wants to start running a certificate program around a wireless lab setup. To mitigate any potential problems from this, we'd like to try to isolate the lab wireless to the one room as much possible. Does anyone have any recommendations for wifi blocking paint, or other building material choices and techniques? thanks! Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss.
RE: [WIRELESS-LAN] Wifi blocking paint?
Keep in mind that RF goes up and down as well. If this is a multistory building shielding has to be considered for floor and ceiling as well as walls. From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Chuck Enfield Sent: Thursday, February 16, 2017 3:52 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Wifi blocking paint? If the lab needs to be completely isolated you're going to want to hire a consultant to design a shielding system. If you just need enough attenuation to mitigate significant interference, I've heard good things about the yshield paint. You can add about 30-40dB of loss to a wall. If you can keep your radios 40-50 feet apart, this should isolate them from each other enough that they disappear into the noise floor. Keep in mind that it has to be grounded for maximum effect, and if I'm skeptical about the efficacy of the paint it's mostly to do with this. Good bonding and grounding is hard, and carbon paint doesn't strike me as a great medium for reliable bonding. That said, at Wi-Fi wavelengths ground quality shouldn't be too much of a factor in attenuation as long as you keep antenna elements far enough from the walls to avoid near field effects. But if the grounding isn't effective you could end up with excessive internal reflection in the lab. No problem if there's a normal amount of absorptive material in the room, but could be a problem otherwise. Just my two cents. Chuck From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Sweetser, Frank E Sent: Thursday, February 16, 2017 3:27 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: [WIRELESS-LAN] Wifi blocking paint? Hi all, we just got word that a professor here wants to start running a certificate program around a wireless lab setup. To mitigate any potential problems from this, we'd like to try to isolate the lab wireless to the one room as much possible. Does anyone have any recommendations for wifi blocking paint, or other building material choices and techniques? thanks! Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss.
RE: [WIRELESS-LAN] Wifi blocking paint?
If the lab needs to be completely isolated you're going to want to hire a consultant to design a shielding system. If you just need enough attenuation to mitigate significant interference, I've heard good things about the yshield paint. You can add about 30-40dB of loss to a wall. If you can keep your radios 40-50 feet apart, this should isolate them from each other enough that they disappear into the noise floor. Keep in mind that it has to be grounded for maximum effect, and if I'm skeptical about the efficacy of the paint it's mostly to do with this. Good bonding and grounding is hard, and carbon paint doesn't strike me as a great medium for reliable bonding. That said, at Wi-Fi wavelengths ground quality shouldn't be too much of a factor in attenuation as long as you keep antenna elements far enough from the walls to avoid near field effects. But if the grounding isn't effective you could end up with excessive internal reflection in the lab. No problem if there's a normal amount of absorptive material in the room, but could be a problem otherwise. Just my two cents. Chuck From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Sweetser, Frank E Sent: Thursday, February 16, 2017 3:27 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Wifi blocking paint? Hi all, we just got word that a professor here wants to start running a certificate program around a wireless lab setup. To mitigate any potential problems from this, we'd like to try to isolate the lab wireless to the one room as much possible. Does anyone have any recommendations for wifi blocking paint, or other building material choices and techniques? thanks! Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss.
Re: [WIRELESS-LAN] Wifi blocking paint?
If it'll block gamma rays, it'll block wifi. Lead. :) On Thu, Feb 16, 2017 at 2:27 PM, Sweetser, Frank E wrote: > > Hi all, > > > we just got word that a professor here wants to start running a > certificate program around a wireless lab setup. To mitigate any potential > problems from this, we'd like to try to isolate the lab wireless to the one > room as much possible. Does anyone have any recommendations for wifi > blocking paint, or other building material choices and techniques? > > > thanks! > > > Frank Sweetser > Director of Network Operations > Worcester Polytechnic Institute > "For every problem, there is a solution that is simple, elegant, and > wrong." - HL Mencken > ** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at http://www.educause.edu/ > discuss. > > -- *dan b. lauing ii* *Wireless Network Administrator* *Mississippi College* -- *CONFIDENTIALITY STATEMENT:* This communication may contain confidential information. If you are not the intended recipient or if you are not authorized to receive this communication, please notify and return the message to the sender, *then delete this communication including any attachments*. Unauthorized reviewing, forwarding, copying, distributing or using this information is strictly prohibited. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss.
