<div dir="ltr"><div><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr">
<table bgcolor="#ffffff" cellpadding="0" cellspacing="0" width="100%">
<tbody>
<tr>
<td align="left" valign="top">
<table cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td style="border-top:0px solid rgb(0,0,0);border-bottom:1px solid rgb(255,255,255);background-color:rgb(255,255,255);text-align:center" align="center"><span style="font-size:10px;color:rgb(96,96,96);line-height:200%;font-family:verdana;text-decoration:none">Email
not displaying correctly? <a href="http://www.oplin.org/4cast/" style="font-size:10px;color:rgb(0,0,255);line-height:200%;font-family:verdana;text-decoration:none" target="_blank">View
it in your browser.</a></span></td>
</tr>
<tr>
<td style="border-top:0px solid rgb(51,51,51);border-bottom:0px solid rgb(255,255,255);background-color:rgb(255,255,255)">
<center><a><img src="http://www.oplin.org/4cast/wp-content/themes/unlimited/assets/images/4cast_email_header.png" title="OPLIN" alt="OPLIN 4Cast" align="middle" border="0"></a></center>
</td>
</tr>
</tbody>
</table>
<table style="width:763px;height:877px" bgcolor="#ffffff" cellpadding="20" cellspacing="0">
<tbody>
<tr>
<td style="font-size:12px;color:rgb(0,0,0);line-height:150%;font-family:'Gothic Sans',sans-serif" bgcolor="#ffffff" valign="top">
<p>
<span style="font-size:20px;font-weight:bold;color:rgb(0,0,0);font-family:arial;line-height:110%">OPLIN 4cast #467: Wi-Fi interference</span><br>
<span style="font-size:11px;font-weight:normal;color:rgb(102,102,102);font-style:italic;font-family:arial">December 9th, 2015</span></p>
<p style="text-align:justify;font-size:16px;font-family:arial;line-height:110%"><img align="left" src="http://www.oplin.org/4cast/wp-content/uploads/2015/12/white_noise.png" alt="white noise" width="130" height="90" style="padding-right:14px;padding-top:4px;padding-bottom:4px">
At the beginning of December, the British telecommunications regulator Ofcom created a lot of <a href="http://www.itp.net/605695-fairy-lights-interfering-with-wifi" target="_blank">attention in the media</a> when it released a warning that holiday lights could interfere with Wi-Fi performance. Wi-Fi performance in libraries is always a concern, not just during the holidays, with everything from microwave ovens to aluminum blinds potentially causing problems. The recent articles linked below might give you some ideas of where to look if you suspect a Wi-Fi interference problem.
</p>
<div> </div>
<ul style="text-align:left">
<li style="text-align:justify;font-size:16px;font-family:arial;line-height:110%"><a href="http://www.networkcomputing.com/wireless-infrastructure/7-wifi-killers-that-may-surprise-you/d/d-id/1323396" target="_blank">7 WiFi killers that may surprise you</a> (Network Computing | Lee Badman) "WiFi works in the unlicensed 2.4-GHz and 5-GHz frequency ranges. There are many other devices that also leverage the fact that you can transmit in these spectrums without expensive and complicated licensing requirements. In addition, all the wireless devices that tend to step on each other are required to tolerate interference, unless you can change their channel to a non-polluted one within their operational profiles. In other words, interference is a fact of life under the current rules."</li>
<li style="text-align:justify;font-size:16px;font-family:arial;line-height:110%"><a href="https://www.midco.com/Support/Internet/performancespeed/how-does-wireless-internet-interference-happen/" target="_blank">How does wireless Internet interference happen?</a> (Midcontinent Communications) "Today's world is full of the Internet of Things - and it's only growing as our homes become filled with an increasing number of devices that connect to the Internet, mostly wirelessly. Examples of devices that can cause wireless interference include laptops, phones, tablets, streaming media players, TVs, Blu Ray players, printers, exercise equipment, sound bars, thermostats, refrigerators, bathroom scales, security cameras, cordless phones, microwave ovens and more."</li>
<li style="text-align:justify;font-size:16px;font-family:arial;line-height:110%"><a href="https://support.metageek.com/hc/en-us/articles/200628894-Wi-Fi-and-non-Wi-Fi-Interference-Examples" target="_blank">Wi-Fi and non-Wi-Fi interference examples</a> (MetaGeek | Taylor Bell) "Bluetooth devices are active in the 2.4 GHz band. These devices are frequency hoppers that impact all channels, so you can't move your Wi-Fi to avoid their transmissions. However, Bluetooth devices are relatively low-powered and hop very quickly, and will have limited impact on Wi-Fi devices. It isn't until many Bluetooth devices are active simultaneously that you are likely to see problems with your Wi-Fi."</li>
<li style="text-align:justify;font-size:16px;font-family:arial;line-height:110%"><a href="http://boundless.aerohive.com/experts/why-lteu-is-the-next-great-interference-threat-to-wifi.html" target="_blank">Why LTE-U is the next great interference threat to Wi-Fi</a> (Aerohive Networks | Craig Mathias) "Perhaps the biggest threat now on the horizon for Wi-Fi is a form of the cellular technology LTE (often called "4G") that actually operates on the unlicensed bands. It's called, for that reason, <a href="http://www.prnewswire.com/news-releases/lteu-forum-explores-technical-possibilities-of-lte-in-unlicensed-spectrum-300043401.html" target="_blank">LTE-U</a>, but is more formally known as LAA-LTE, and is designed to be deployed indoors just like Wi-Fi. But LTE-U isn't Wi-Fi; it's in fact incompatible to the point the LTE-U can essentially lock out Wi-Fi entirely. It does this by using a shorter listen-before-talk period than Wi-Fi specifies, so LTE-U will always grab free airwaves ahead of Wi-Fi."</li>
</ul>
<div style="text-align:left"> </div>
<p style="text-align:left;font-size:20px;font-family:arial;line-height:110%"><small><strong><em>Articles from <a href="http://ohioweblibrary.org" target="_blank">Ohio Web Library</a>:</em></strong></small><br>
</p>
<div style="text-align:justify;font-size:16px;font-family:arial;line-height:110%">
<ul>
<li><a href="http://search.ebscohost.com.proxy.oplin.org/login.aspx?direct=true&db=buh&AN=103115046&site=ehost-live" target="_blank">LTE-U steamrolls into WiFi.</a> (<em>Broadcasting & Cable</em>, 6/8/2015, p.16 | Leslie Ellis)</li>
<li><a href="http://search.ebscohost.com.proxy.oplin.org/login.aspx?direct=true&db=buh&AN=108546257&site=ehost-live" target="_blank">Parties renew disagreements over LTE-U/LAA impacts.</a> (<em>Telecommunications Reports</em>, 7/1/2015, p.41-45 | Paul Kirby)</li>
<li><a href="http://search.ebscohost.com.proxy.oplin.org/login.aspx?direct=true&db=aph&AN=110930532&site=ehost-live" target="_blank">Expanding mobile capacity: The evolution to LTE-U and LAA.</a> (<em>Microwave Journal</em>, 2015 Supplement, p.16-20 | Andreas Roessler)</li>
</ul>
</div>
<div style="text-align:left"> </div>
</td>
</tr>
<tr>
<td valign="top" width="760"><span style="font-size:10px;color:rgb(96,96,96);line-height:100%;font-family:verdana">
<hr>
<div style="text-align:justify">The <strong><em>OPLIN
4cast</em></strong>
is a weekly compilation of
recent headlines, topics, and trends that could impact public
libraries. You can subscribe to it in a variety of ways, such as: <br>
</div>
<div style="text-align:left"> </div>
<ul>
<li style="text-align:justify"><strong>RSS feed.</strong>
You
can receive the OPLIN 4cast
via RSS feed by subscribing to the following URL:
<a href="http://www.oplin.org/4cast/index.php/?feed=rss2" target="_blank">http://www.oplin.org/4cast/index.php/?feed=rss2</a>. </li>
<li style="text-align:justify"><strong>Live Bookmark.</strong>
If you're using the Firefox
web browser, you can go to the 4cast website
(<a href="http://www.oplin.org/4cast/" target="_blank">http://www.oplin.org/4cast/</a>) and click on the orange "radio wave" icon
on the right side of the address bar. In Internet Explorer 7, click on
the same icon to view or subscribe to the 4cast RSS feed. </li>
<li style="text-align:justify"><strong>E-mail.</strong>
You
can have the OPLIN 4cast
delivered via e-mail (a'la OPLINlist and OPLINtech) by subscribing to
the 4cast mailing list at
<a href="http://mail.oplin.org/mailman/listinfo/OPLIN4cast" target="_blank">http://mail.oplin.org/mailman/listinfo/OPLIN4cast</a>. </li>
</ul>
</span> </td>
</tr>
<tr>
<td style="text-align:center;font-family:'Century Gothic',sans-serif;border-top:0px solid rgb(255,255,255);background-color:#2c4587;color:#fff" valign="top" width="760">© 2015 Ohio Public Library Information Network<br>
<a href="http://www.slideshare.net/oplin" title="Find us on Slideshare" target="_blank"><img src="http://www.oplin.org/4cast/wp-content/themes/unlimited/assets/images/slideshare3.png" alt="Find us on Slideshare"></a>
<a href="http://www.facebook.com/oplin.org" title="Find us on Facebook" target="_blank"><img src="http://www.oplin.org/4cast/wp-content/themes/unlimited/assets/images/facebook_0.png" alt="Find us on Facebook"></a>
<a href="https://plus.google.com/107751358238995507967" title="Find us on Google+" target="_blank"><img src="http://www.oplin.org/4cast/wp-content/themes/unlimited/assets/images/google+.png" alt="Find us on Google+"></a>
<a href="http://www.twitter.com/oplin" title="Find us on Twitter" target="_blank"><img src="http://www.oplin.org/4cast/wp-content/themes/unlimited/assets/images/twitter_0.png" alt="Find us on Twitter"></a>
</td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</div></div></div></div></div></div></div>
</div>