Believe it or not but I am still using an 802.11g access point at home because the 802.11n access point that is part of my high end VDSL router at home is just crap. In most cases the 20 Mbit/s I can get out of it through two walls is good enough for my purposes. … Continue reading Some Wi-Fi 802.11n and 802.11ac speeds in practice
Now that I know a couple of ways how to build a clock generator I've moved on to the next step and have started looking into what kind of RAM I want to use for my Do It Yourself CPU (DIY-CPU). Here's the story of how that went: As it's an experimental system I only … Continue reading The DIY-CPU Project – Experimenting With RAM Using a Raspberry Pi
About twice a year there are rumors in the German mobile industry that O2 and E-Plus are about to merge one way or other. This time, it's more than a rumor as O2 has actually made an official offer of around 5 billion Euros in cash + 17% of O2 stock for Dutch telecom incumbent … Continue reading O2 Germany and E-Plus To Merge (Yet Again)? Some Thoughts on Benefits and Tech Background
Antennas and base station sites, they can be seen everywhere these days but it's pretty difficult to see how they change over time. When I recently came home and looked out the window I could at first not exactly say what it was but I had the impression that something had changed at the antenna … Continue reading How Antennas Change Over Time
And here's the post I hinted at earlier on cellular network coverage in the popular district I've been reporting about with an antenna on everything that does not move. Think I exaggerate? Then have a look at the screenshot on the left, produced with output from my Cell Logger App. Each red dot is the … Continue reading Seoul: A Cell Every 50 Meters
Once you have more than just your notebook connected as part of your local wireless network at home to ultimately reach the Internet, there is of course the need and desire to exchange data between the devices. Sure, there are cloud services, but for those who like to keep their files and private data close … Continue reading File Exchange with Android Devices in the Home Network: SMB
As reported in the press and here yesterday, it's been 20 years since the first GSM call was made in a commercial network. July 1st 1991, what's behind the date? According to this book on the history of GSM in Germany, published in 1994 (!), the date was set already in the mid 1980's as … Continue reading Some background info on the First GSM Call on July 1st 1991
This post is part 3 of the series that looks at how Android based devices interact with Google in the background. In part one, I've been analyzing what an Android device does if the user gives the device his Google login credentials and otherwise leaves the settings as they are. Part 2 then looked at … Continue reading Android Calling Home – Part 3 – How To Stop It
A quick note about the recent release of Firefox 4: While I am usually bit reluctant to immediately update to new software versions that are likely to break some add-ons until the authors have caught up with the version numbering I gave Firefox 4 a try as I could install it in a separate directory … Continue reading Firefox 4 Gives Me Speed and 2 More Lines
A self observation today: Call it spring cleaning but today I felt like organizing the PC a bit and remove any unnecessary components and programs that just slow down the startup sequence and are no longer used anyway. One of the components that fell pray to this action is the Bluetooth protocol stack of my … Continue reading Bluetooth Stack Removed from the PC