Difference between revisions of "Speed"

Revision as of 21:32, 21 September 2021

Troubleshooting DSL

Internet service is provided to NCF members with an "up to" speed for both download and upload. This means that it can be less than that speed, for reasons that are out of NCF's control.

There are a myriad of factors that affect the actual speed of your connection. This article will attempt to address the main ones.

How much speed are you getting?

A speed test from speedtest.ncf.ca

Don't rely on subjective appraisals that some websites are loading slowly to determine that your speed is slow. It is very common that the speed limiter is the server at the other end. For instance, news video websites can be very slow in the evenings, because many people are trying to download the videos all at once.

Your achieved DSL speed should be objectively measured, which is easy to do. There are two speeds that are relevant:

Your line profile speed, which your modem detects and records in its line stats. Line Stats shows you how to find out what your modem records the line profile as.
Your actual achieved speed, though running a speed test.

Line profile speeds

Why would your line profile be set below the maximum? Because your distance from Bell's DSL equipment or the quality of Bell's lines to your house cannot support a higher speed. DSL signal degrades with distance from the DSL equipment and distances over 5 km tend to be very marginal for DSL signals. Even shorter distances can result in service instability and loss of connection at higher speeds. The cure for this is to slow down the speed to prevent disconnections.

You can get some idea of your distance from the DSL equipment and whether distance is an issue for your location, by checking your line attenuation. If the attenuation is high then you are far from the DSL equipment and a lower profile is probably called for to prevent frequent disconnections.

You can see your stats as seen by NCF here. Note the date on that page that says when they were collected. The profile speed is not necessarily the same as your speed attained.

Achieved Speeds

Why don't speed test results match the profile?

You will rarely see your profile speed as a download speed on a speed test. There is a service "overhead" on all DSL speeds that means that achieved speeds are usually limited to about 85% of the profile speed. If you have a 10 Mb/s download profile speed this will mean ideally you should see speed tests turn in results of about 8.5 Mb/s. Similarly with upload speeds on a profile of 800 Kb/s upload profile expect to see the speed test turning in a result of 680 Kb/s.

How to do a speed test

speedtest.ncf.ca.

To find the speed of your internet connection, try a speed test website and wait for the test to complete. Ideal test conditions are:

A proper test of your connection should use a wired Ethernet connection.
- If you test both Ethernet and WiFi and find a significant difference in speed then that is due to the losses and interference involved in Wi-Fi.
With only one device on your network using the internet connection.
With background internet applications and processes like cloud services (for example, iCloud, Google Drive or torrents) stopped.
With only the tab for the speed test open in your web browser.

It is normal for the download speed to be much faster than the upload speed. This is intentional, so that you are able to download big files quickly. Normal, good results for 6 Mbps service would be something like 5.2 Mbps download, and about 600 Kbps upload.

If your results are not as good as you would expect, try Troubleshooting DSL or Troubleshooting Cable for ideas on what to check to improve the performance of your connection.

Speed tests:

Note: Because different test servers are located in different geographical places their results are not comparable to each other and testing the same connection on different speed tests will provide different results. If you use a speed test to monitor your connection over time, then always use the same test.

What if the speed test shows slow speed?

If you are on a profile with up to 10 Mbps download and you are seeing speed test results above 8 Mbps in real world conditions that is normal. If you are getting download speeds in the range of 5 Mbps or lower then that may indicate a problem.

It could be due to any one of a number of problems:

Network Congestion

If you get expected speeds in the morning and late at night, but experience slower speeds in the evenings and on weekends then the likely culprit is network congestion. NCF has investigated network congestion problems in the past and correct issues between the NCF network and the Bell Network at the aggregation point.

Today NCF increases its bandwidth on regular basis to stay ahead member demand, but slowdowns still occur on the internet beyond NCF, as this article explains.

Other Users

When you did the speed test were you the only person using your internet connection? If someone else in the house is watching a video, streaming audio or is playing a game, it will consume bandwidth and give you a slower speed test result. Try retesting when you are sure no one else is online using your connection.

Are you running your wireless unencrypted? Are people outside your home using your bandwidth? Running your wireless unencrypted is not recommended.

Wireless

Speeds seen when speed testing via wireless connection are almost always slower than via wired Ethernet connection, unless the device connected wirelessly is very close to the router. Even with an "N" protocol wireless router a laptop being used for a speed test a floor above the router will typically see half the expected speeds. With "G" protocol wireless it may be one quarter the expected speed, or worse, if there is interference from other nearby networks.

If you are not getting good speed on your wirelessly connected device then try connecting it via an Ethernet cable and see if that makes a difference. See WiFi for more information on troubleshooting WiFi performance

Modem

Any modem should provide comparable speeds on the same line, unless the modem is starting to fail. One possible sign of a failing modem is loss of speed, especially once it is warmed up and has been running for an hour or two.

Poor ventilation for a modem can cause it to overheat and lose speed, so ensure that your modem has good airflow around it.

If you suspect your DSL modem may be the issue contact the NCF office to arrange to borrow a loaner DSL modem to take home and test out your connection.

Web Browser

Running a speed test on an older web browser will often turn in slow results, because the browser is slow. Make sure you have the latest version of your browser to ensure that the speed test is not being limited.

Some browsers don't necessarily work well or fast and can produce slow results, particularly some versions of Microsoft Internet Explorer. Try a better browser:

Apple Safari for macOS
Brave for Linux, macOS, and Windows
Chromium for BSD and Linux
Gnome Web (formerly called "Epiphany") for Linux
Google Chrome for BSD, Linux, macOS, and Windows
Midori for BSD, Linux and Windows
Mozilla Firefox for BSD, Linux, macOS, and Windows
Mozilla SeaMonkey for BSD, Linux, macOS, and Windows
SRWare Iron for BSD, Linux, macOS, and Windows
Vivaldi for Linux, macOS, and Windows

Operating System

An operating system on your computer that has errors and is malfunctioning will not provide accurate speed test results. Microsoft Windows, in particular, can slow down over time and can turn in poor results.

This can easily be tested by running a speed test on another computer and seeing if the results are different, or booting up another operating system and testing using that. A simple, RAM-based operating system, like Puppy Linux is easy to boot into RAM and, with its included Firefox browser, conduct a speed test. If the result is faster than normal, then the operating system is probably the culprit.

Computer Hardware

It is also possible that your computer's network or wireless card is failing and producing slow speeds. The easiest way to test this is by using another device to conduct a speed test and then compare the results. Different devices connecting the same way and using the same speed test should see similar results.

If nothing works

If none of these hints manages to resolve unexplained slow speed, then your next step should be Troubleshooting.

External links

The bandwidth bottleneck that is throttling the Internet, by Jeff Hecht, Nature

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 <div class="ncfrightbox"> {{Template:Troubleshooting DSL Links}} </div>
-[[File:NCF Speedtest Result.png|thumb|360x360px|A speed test from [http://speedtest.ncf.ca speedtest.ncf.ca]]]
 Internet service is provided to NCF members with an "up to" speed for both download and upload. This means that it can be less than that speed, for reasons that are out of NCF's control.
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 ==How much speed are you getting?==
+[[File:NCF Speedtest Result.png|thumb|360x360px|A speed test from [http://speedtest.ncf.ca speedtest.ncf.ca]]]
 Don't rely on subjective appraisals that some websites are loading slowly to determine that your speed is slow. It is very common that the speed limiter is the server at the other end. For instance, news video websites can be very slow in the evenings, because many people are trying to download the videos all at once.