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8 reasons to turn down the transmit power of your Wi-Fi
By default almost all WiFi access points transmit at full power (100mW on 2.4GHz). This gives maximum coverage and users see a good signal (“full bars”). However, there are good reasons to turn down the transmit power to a fraction of the maximum.
A solution for poor LTE signal strength?
Mikrotik SXT LTE is an outdoor LTE modem and router, that may provide a far better signal and data rates for fixed installations than an indoor solution.
Affordable enterprise WiFi
Centrally managed Enterprise WiFi doesn’t have to cost an arm and a leg
Alright, it’s 802.11 but what are the characters? (a, b, g, n, ac)
What are 802.11a, 802.11b, 802.11g, 802.11n and 802.11ac?
Automatic Wi-Fi channel management
Most Wi-Fi systems have some kind of automatic setting for selecting the channel. Systems with a central controller have advanced RRM or Radio Resource Management solutions. The promise is to optimize channel selection, transmit power levels and other settings. Can you trust this automation?
CWNE#307, Petri Riihikallio
I am the first Certified Wireless Network Expert in Finland. I was certified in February 2019. This article is about CWNE and how I got into this.
In Wi-Fi world you are bound to come across decibels. Yet they confuse many of us. Sound is measured in decibels, but Wi-Fi? And what about those negative numbers? How can a signal be negative?
Fix GCP UniFi Controller certificate issue
If you are using my script to Set up UniFi Controller on Google Cloud Platform and you have been affected by the Let’s Encrypt root certificate roll over, you will need this fix. Just Stop and then Start your virtual machine in Google Cloud Console. This will update the VM with new code. Presuming of course that … Continue reading “Fix GCP UniFi Controller certificate issue”
GCP Unifi Controller startup script explained
This is a walkthrough of the Google Cloud Platform virtual machine startup script to launch full featured Unifi Controllers on demand.
How can a single user cripple the WiFi network?
..and what is Airtime Fairness?
How many users can one Wi-Fi access point support?
Sounds like a simple question. However, no matter how much you search, you can’t seem to find an answer. The reason is simple, it depends…
How secure is your WiFi?
Do you have a shared password to the WiFi network? When was it last changed? Hasn’t anyone left the company since?
How to build a working WiFi in an older residential house
Modern WiFi coverage is needed in older residential houses as well. It isn’t always easy to achieve. Here are a couple of design points to consider.
How to set up Ubiquiti UniFi WiFi access points with an iOS device (iPhone or iPad) in 5 minutes
If you have a very small deployment, you don’t need to set up a UniFi Controller at all. You can get by just using the iOS mobile app.
Increase your cell phone battery life with a small change in the Wi-Fi network
This may sound silly, but yes, you can really improve your cell phone battery life with a small change in the access point. The change has no drawbacks and is easy to make. It has even more impact in your home Wi-Fi where your cell phone spends most of its time in sleep mode.
Set up UniFi Controller on Google Cloud Platform
Google offers one free virtual machine on Google Cloud Platform. This script will make setting up a UniFi Controller on GCP a breeze and it includes all the goodies. No command line required, everything is done in the GCP Console and it takes 15 minutes total and that includes transferring your current sites to the cloud. You should try this!
Tuning your Wi-Fi by adjusting transfer rates
In most Wi-Fi systems you can disable the slowest transfer rates. This is typically done to improve efficiency since the transfers at slower rates eat up limited air time. This can backfire however with unexpected results.
Ubiquiti UniFi WiFi product line
UniFi network devices share common management through UniFi Controller. However, how all the pieces fit together is not obvious at first sight.
Upgrading to 802.11ac
802.11ac will yield enormous speed and capacity, but what are the points you need to consider?
Weather radars in Finland
Don’t use the same WiFi channel as the closest weather radar!
What are WiFi DFS frequencies and should I care?
The regulatory bodies are now strict about DFS requirements on WiFi access points. This applies to both new devices and updates to old ones. A simple firmware update may cause a lengthy delay before the network is operable.
Wi-Fi Repeaters, WDS, Mesh and Other Wireless Backbones
Quite often the most expensive part of a Wi-Fi deployment is the cabling. Cabling? Wasn’t this supposed to be wireless? Can’t we use these APs wirelessly? At least there are lots of products claiming to do so.
Roaming or switching from one access point to the next is a common source of confusion. Technically Wi-Fi roaming is the opposite of the cellular network. Wi-Fi access points are passive and the client devices choose which access point they want to use and when to switch, if they switch. What are the consequences?
WiFi – from a nice-to-have to a requirement
When was your WiFi network deployed? How many users did it have? How many users are there today?
WiFi 2.4GHz band
The original Wi-Fi (also known as 802.11) used the 2.4GHz band. It is still the more popular band since virtually all devices support it. That makes it more crowded and it is also more prone to interference than the alternative 5GHz band.
WiFi 5GHz band and wide channels
On 5GHz WiFi there are more channels and less interference, both are important for fast wireless communications. The bandwidth can even be increased multifold by combining channels.
WiFi heat maps
It is fairly easy to create a heat map of a WiFi network that shows the signal level across the coverage area. What’s the use, what’s the benefit of surveying and is it worth paying for?
WLAN, Wi-Fi, WiFi or 802.11 – what’s the difference?
They all mean the same thing
WPA3 is the latest Wi-Fi Protected Access
Wireless communication is easy to intercept if you are within range. Good security measures are a must. Wi-Fi security has evolved from WEP to WPA, to WPA2 and now to forthcoming WPA3. What will change?