Why Wireless Networks Fail

By Dennis McCafferty

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Dueling Access Points

Access points—such as those set up through auto-configuration settings—can interfere with each other. Make sure your network design positions these points correctly.
Competing Frequencies

WiFi doesn't recognize walls if they're not made of metal, so a neighboring building's setup may conflict with yours. In this case, work with your peers in that building so the networks can coexist.
The H2O Effect

Water from pipes or supply closets can absorb signals, so identify the places where all concentrations of water exist and work around them.
Mother Nature

If you set up an outdoor network in winter, keep in mind that trees will eventually start blooming. When they do, water in the leaves can disrupt your signal.
Tall Ceilings

Access points and antenna placement should be located no more than 35 feet off the ground. If you don't have a more accommodating space, consider a directional antenna.
Capacity Challenges

To satisfy this, estimate your projected number of users and then determine how many will need to use WiFi at any given time.
Frequency Overload

Examine all devices used in your space because multiple frequencies, which can come from someone's Bluetooth or even a microwave, can conflict and diminish connectivity.
Wrong Signals

A 2.4 GHz signal, for example, is less susceptible to a loss of power. But 5GHz is better for offices in which video streaming is key, because it packs more data punch.
Surface Issues

Structural surfaces can impact coverage. Reflecting surfaces, such as stainless steel appliances, can benefit WiFi. But refraction—from a metal pole, for example—will interfere.
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By 2017, there will be five connected devices for every Internet user, according to industry projections. This puts a lot of pressure on IT teams setting up WiFi networks that provide outstanding performance and uninterrupted availability. Rising to the challenge, however, doesn't always involve an expensive IT upgrade. In fact, WiFi network capabilities are often greatly influenced by non-tech considerations, such as building design. Fortunately, you don't need a degree in architecture to prevent major issues, as Randstad Technologies has come up with a list of top reasons why WiFi networks fail, along with best practices for avoiding these problems. The following slides were adapted from Randstad's list of potential problems and solutions. They range from conflicting access points to frequency overload to towering ceiling heights to obstructions as small as a leaf on a tree. When investigating a disruption, you may even discover that the office kitchen's microwave—or the nearby dishwasher or refrigerator—is the culprit.

This article was originally published on 2015-03-11

Dennis McCafferty is a freelance writer for Baseline Magazine.

Why Wireless Networks Fail

Dueling Access Points

Competing Frequencies

The H2O Effect

Mother Nature

Tall Ceilings

Capacity Challenges

Frequency Overload

Wrong Signals

Surface Issues