Category Archives: Networks

Network switches; routers; firewalls; accelerators; load balancers and other network appliances

Real World WiFi Speeds

Real World Wi-Fi Speeds

IEEE standard Wi-Fi Alliance Standard Theoretical Speed Real-world Speed
802.11ax Wi-Fi 6 10Gps 700Mbps
802.11ac Wi-Fi 5 1.3Gps 200Mbps
802.11n Wi-Fi 4 600Mbps 150Mbps

Wireless Broadband Alliance (WBA) real world trials carried out in the “hostile” environment of the Mettis Aerospace facility in the UK West Midlands.


Alternative DNS Addresses


OpenDNS (,

Google Public DNS (,

Cloudflare (,


OpenDNS 2620:0:ccc::2 and 2620:0:ccd::2

Google 2001:4860:4860::8888 and 2001:4860:4860::8844

Cloudflare 2606:4700:4700::1111 and 2606:4700:4700::1001.

CA Useful Notes

Computer Active Useful Notes


35719 Sharpkeys – keyboard remapper
35663 ShutUp10 Tweek Windows 10 security settings in one place
35467 Win+X Menu Editor – Windows 10 Win+X menu editor
34569 Heatmapper produces WiFi heat map to find strongest WiFi
33034 Inatec 2.5″ HDD/SSD USB Enclosure
32799 Padlet – share content
32643 Captura – records Windows screen(s)
32442 Glasswire firewall – identifies programs that use your Internet, Elite 7day trial
31235 Android Magnifying Glass (IOS 31236)
30849 Appbuster Bulk Windows uninstall programs
30789 Search Companies House
29712 CloneApp Backup Windows App and System Settings default features
29899 MiTec Task Manager Delux – better Windows Task Manager
27353 Lasso to prioritise RAM for programs that need it
28329 NoBot AV scanner – use with AdwCleaner
28321 ControlMyMonitor colour tweaker, from NirSoft
28351 BleachBit remove hidden junk like ccleaner without paywall limitations
27011 Mpow’s Air Vent Mount <£10
26883 InSpectre Meltdown + Spectre detector and perf indicator – also disables patch
26868 Whocrashed 6.01 BSOD Analyser
26836 Cloudberry – remote access via web browser
25761 Google Backup&Sync 15GB free storage
26760 Drive Formatter – Wipe data
26400 DMEX Explorer tool ctrl-F1 menu to split windows
26359 W10 WinAero Tweaks
26358 Bootracer see which programs slow PC start up
25237 Windows Repair Pro
25199 Colorize Photos
24973 MusicBee +
24368 Wise Program Uninstaller
23038 AllDup free duplicate file finder

Tips & Recommendations
Weed out broken system files
Run Deployment Image Servicing and Management tool
dism.exe /online /cleanup-image /Restorehealth
Once finished, check with System File Checker
sfc /scannow

Useful Stuff
Virtualbox Snapshot – virtual system backup in seconds – fake email address – alternative =
O&O AppBuster – W10 app/program uninstaller which removes most stubborn apps – organise a get-together, send email link
WeTransfer instead of email attachment store file on their server and send recipient message + file link
MediaFire as WeTransfer but videos
Netgear Arlo Pro 2 camera inc 7 day online storage
Money Manager EX – replacement for Microsoft Money (support ended 2009)
Adobe Photoshop Express free Windows 10 basic photo editing app Back up installed software to move to another PC/OS
Moneypool – Paypal Group to collect money
Logitech MK540 coffee prof kb + mouse – wireless only
Fast DNS Extract text from screenshot
netsh wlan show profile “NETWORK” key+clear – Show WiFi password
netsh wlan show profile – Show WiFi networks
Notepad log book add .LOG to print time stamp on open
NordVPN best paid for VPN £9.10/mon
TunnelBear alternative free/paid VPN 1.5GB/mon with TWitter a/c free Unlimited Teamviewer alternative
Remove USB command line utility

Recommended Printers

  • Epson XP-7100 Expression Premium £145 – Small footprint and packed with features. Economical to run with re-manufactured carts.
  • Brother MFC-J5330DW £120
  • Epson WF-3720DWF £80
  • HP Officejet 8715 £150 – bit noisy, but fast
  • Canon MG5750 £55 – no ADF
  • Canon TS6150 £100 – no ADF
  • Epson EcoTank ET-2710 179.99 – no ADF. No manual controls. Must use supplied Windows CD to setup.

Budget Routers

  • ASUS DSL-AC68U £129

Eliminate slow Broadband due to faulty BT Line

If you have a slow ADSL broadband the first thing to do is eliminate a faulty line coming to the building. The best way to test this is to run a Quite Line Test. This test is not the most scientific and relies on the sensitivity of the human ear. However your ear is very good at picking up noise interference when it is supposed to be dead quiet.

This test pin-points interference between the Exchange and Master socket (the demarcation entry point into the building). Problems here can only be fixed by the line provider, e.g. BT.

Quite Line Test

For the test you will require a good analogue phone; Broadband line filter and a Master socket. The Master socket is located nearest to where the the copper pair from the street enters the building.  If you don’t have a Master socket find the phone socket closest to the BT line entry point into the house. You also you need to be in a quiet room without noise.

The reason to be at the Master socket is to rule out interference from inside the building.  You can remove the lower panel from the Master which disconnects all the extensions in the house and reveals single phone socket. BT calls this the Test Socket. The Test Socket is the direct connection to the BT cable in the street. If you don’t have a Master socket remove all phone devices from extensions within the house before starting the test.

Connect your analogue phone to the Broadband filter (disconnect router ADSL cable if one is connected) and plug the filter into Test Socket or phone socket closest to the BT line,

Dial 17070

At the time of writing you will hear a female voice pre-recorded voice say:

  • This circuit is defined as 01234 123123 <= your phone number
  • Openreach line test facilities
  • Please press  1 for ring back, 2 for quiet line, 3 for fast test, 4 for fact cleanse or clear down.
  • [message repeats 3 times]

Note: the other options are for engineers only.

Select option 2 (quiet line) and listen to what you hear. You should hear perfect silence on the line – there should be no pops, clicks, whistles, buzzing and the like. If you do not hear silence first check that it is not the phone you are using, wriggle the cable a bit to see if that affects it, if not then you know you have a problem with your line to the BT exchange. Any problems with ADSL connectivity (low speed, connections dropping, etc) are likely caused by this and can only be addressed by BT.

You can now put your Master socket together (reconnect extension devices) to re-enable all phones in your house or for those without a Master socket reconnect all your extension phone devices.

Testing Internal Wiring

After reconnecting your phone equipment you can repeat the same test. If you hear now hear noise on the line you can put it down to your internal wiring. Things to check for are cables running near transformers or motors and compressors introducing EMF noise on the line and faulty phone equipment, such DECT base units, injecting noise. To track down these remove all phone equipment and reconnect each one at a time and repeat the test until you track down the unit causing the noise,

BT Telephone Wiring

BT colour coded Master and Extension wiring

BT Drop Cable (cable coming from outside the building)

This often has Orange, White, Green and Black wires.  Usually (but not always) Orange and White are the active pair and go to two connectors marked A and B ( link to 2& 5).  A and B connection points are accessed by removing the Master socket from the wall.

Which way around the A and B pair is connected usually doesn’t matter but some modems and answering machines  are fussy about polarity, so it’s best to check the voltage on the line using an analogue multimeter and connect -48V leg to B and 0V leg to A. To test which one is B set the multimeter to a higher voltage range, e.g. 100 – 200V and watch which way the needle swings (setting to a high range is to prevent damage to the meter). If the red probe is connected to B and the black to A the needle will swing in the wrong (negative) direction. Therefore the red is connected to B. Reversing the red and black and setting the multimeter to the correct range, e.g. 0 – 100V should give you a measurable voltage of around 48V.

References: many thanks to Anomalous Aperture, and  WPP Project Management & Telecommunications for their excellent telecommunication web sites and contributions to this web page