VoIP Test (Speed - Jitter - Packet Loss etc)

Our VoIP test has been helping visitors test their Internet connection for VoIP compatibility for over 10 years. The previous version was Java based but all new browsers now prevent Java from running. For this reason we are proud to release our HTML5 version of our popular VoIP test.

In order to run the test, you must download some basic software. This is secure and safe and is needed simply because of HTML5 limitations in terms of its inability to support UDP.

Software for Windows
Software for MAC

Once the software is running simply refresh this browser window and you should see the Start Test button.

This test will take around one minute to complete. The results will include measured information for your Internet connection and consist of a jitter test, upload and download speeds, MOS score and a packet loss test. Use the "Click to start test" button below to start the VoIP test. Ask questions or add a comment about your results here.

Your browser does not support the HTML5 canvas tag.

If your results show five green circles then your Internet connection will support VoIP. If you have four green and then a yellow for consistency of service this is usally fine too. If you are not sure how to proceed, then read the following section on definitions to try to understand what your issue might be.

NOTE: If you see the message "We were unable to measure your connection's jitter/packet loss..." then the most likely issue is that a socket test cannot be initiated (it will do a HTTP/POST test instead of a socket test for speed). This can occur if the ports 20000 and 20001 are blocked for UDP packets (either by something in your setup or by your ISP).

Why is the Speed Slower than my ISP Plan?

The speed results will often be slower than the speed plan you are purchasing from your Internet provider. The reason for this is because we run an application test rather than a capacity test. In other words we are testing how fast an application can run rather than physical line speed. Most applications can only run a single connection so it is more accurate to run this kind of test as opposed to a capacity test which runs multiple connections and hides connection delays.

Technical Term Definitions

Bandwidth - This is a popular term and you have likely had your Internet provider try to up sell you to a higher "bandwidth" that will give you faster speeds for uploads and downloads to and from the Internet. This is typical displayed in Mbps (Mega bits per second) or Kbps (Kilo bits per second) with home Internet download speeds typically ranging from 3Mbps all the way up to 50Mpbs. it really depends on your needs and how much you are willing to pay every month. Also keep in mind that your upload speed will often be significantly less than your download speed. The good news is that for VoIP you only need around 90kbps worth of bandwidth so if you have a regular high speed connection such as DSL or cable, you should be in good shape.

Delay - If your delay is less than 100 milliseconds, your voice calls should consistently be of high quality. Even delays up to 400 milliseconds (as per ITU) can result in decent call quality.

Packet Loss - Any packet loss up to 5% will likely not be noticed by you when you are making calls. As these are digital packets it is often possible to have a packet loss of 0%.

Jitter - This is measured in milliseconds and is created by some instability in your connection. It is a fluctuation in the signal such that it becomes out of sync or displaced from where it should be in the transmission. It is effectively a continuous variation in the delay of packet delivery. VoIP jitter can be tolerated up to 20ms to 30 ms.

MOS Score - MOS stands for Mean Opinion Score and is actually a score given by a human user when evaluating the quality of voice. As it is an opinion, it is subjective. A MOS score of 4.0 or higher is desired.

SIP ALG - SIP Application Layer gateway is a feature in most routers and is supposed to help SIP based calls when going through your home or business router. Unfortunately it causes more harm than good. Make sure the VoIP test indicates N for NO. If it is Y for YES, try and disable it in your router as per our article on disabling SIP ALG. Then re-test.

Other Speed Test Considerations with VoIP

Even if you VoIP speed test results are good, you may still run into issues at some point with your voice calls. This can be due to a number of different reasons but is often caused by your internal network not being configured to prioritize the voice packets over all other packets. For example, if you are streaming video while someone else in the household is uploading some pictures to a cloud application, your bandwidth may be consumed by this video and data traffic, leaving very little room for your voice calls to get through. Think of your Internet connection as a pipe and only so much can fit through that pipe at one time. The way around this is to enable Quality of Service (QoS) on a home network router or telephone adapter, and set it to prioritize voice traffic to the Internet. This effectively reserves some room in your pipe such that you will always have room for your phone calls. For more information and help on potential setup, installation, configuration and ongoing issues, please visit our VoIP troubleshooting section.

Don't jump to conclusions and blame your VoIP provider for poor quality of calls as it may actually be an issue with your own home network.

VoIP Solutions

VoIP phone service has become a real option to millions of households in North America with the incredible speeds and reliability provided by modern day Internet service providers. Many home users see savings in excess of $500 per year on their phone bills. This is one great reason why people consider making the switch to VoIP phone service. Did the speed test above indicate that your internet connection was fast enough for VoIP? If so, check out the great deals available using the table on this page.

To find out more about residential (home) VoIP phone service visit our dedicated section to residential VoIP. Here you will find more information about VoIP for home phone users, including educational articles, provider comparison tables, user submitted reviews and more.

The savings don't stop with home phone service. Many businesses in North America are enjoying paying up to 80% less on their monthly phone bills after switching to a VoIP phone service. If your interest is in a VoIP solution for your business then check out our dedicated section to business VoIP. This provides access to many articles and whitepapers that can help with any questions you have, including FAQ's, service features guides and more. You will also have access to provider comparison tables, user submitted reviews and our free price quote service.


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WhichVoIP Visitor Comments

#50 : Posted by Bill

We have a Viasat/Excede satellite network using a combination modem and router, the only option we were given for connecting to the internet. We bought an Ooma box, and we have terrible voice quality. Viasat said the Ooma box is incompatible. The Voip test showed Consistency of Service at 17%. What are our options as Ooma says it should work fine, it is the Viasat", Viasat says it's the Ooma box. Help...

-> Response: We usually do not recommend VoIP over satellite due to the latencies involved. I am surprised Ooma says it should be fine. The numbers you are seeing in the test do not surprise me and certainly explain the poor voice quality.


#49 : Posted by Robert L George

I need to find out why outgoing calls cannot be clear without breaking up.

-> Response: Sounds like it could be sip alg in your router. Did the test indicate alg was enabled?


#48 : Posted by Jeff

I have found this tool very credible. I test with 5 green circles. My iphone 6 works great over our Viasat plan. I use facetime video and voice to connect with other iphones. Looking forward to disconnecting landline.


#47 : Posted by Raymond

Will an internet phone adapter help with the CoS and packet loss?

-> Response: Unfortunately no it will not. Packet loss and Consistency of Service (CoS) are usually related to the quality of your Internet service and/or home network.


#46 : Posted by Arjan

The most important part of the test for me is the detection of SIP ALG. Unfortunately it is not a Yes or No answer but SIP ALG Firewall : Err Hardware : Fortigate FGT-51E

-> Response: It normally is a YES/NO response, must be issues detecting it with Fortigate unfortunately. Best bet is to go into your Fortigate modem/router and disable SIP ALG to be sure.


#45 : Posted by Arlene

My phone quality breaks up. Saw in Ooma brochure it could be an internet issue. Want to be sure I don't mess up more than I fix. I am using the Ubee DDW36C device.

-> Response: If you run the test on this page it now has a SIP ALG test, at the end does it say Y or N?
If it says Y next step is to look in the users guide for the Ubee DDW36C, section 6, you will see an option to disable SIP ALG (Advanced > Options). I would disable that and save the settings and re-test. Section 3 shows you how to login to the device to do this. ALG often causes issues such as this and may be the issue.


#44 : Posted by Ian Thompson

I've been using your wonderful product for some months simply to measure the quality of my line. Nowadays the "Voice over IP Simulation Progress" bar proceeds to the end of the bar but then goes back to the beginning of the bar and so on ad infinitum. Is this a bug?

-> Response: We just tested it in Chrome and Firefox and it all worked fine. Which browser and operating system are you using?
Did you download the latest software on that page just to be sure?


#43 : Posted by Jben

Excellent testing function, and write-up on meanings. Any chance that you have plans on making this available for Android connectivity testing?

-> Response: At this time it is not available for Android or iOS devices. There are some technical issues trying to get this running as an App on a smart phone but it is something we hope to have in the future.


#42 : Posted by Jben

Are there any plans to extend this to the Android community as there is probably a very large user base for VoIP there.

-> Response: Hopefully we will have something for Android soon. There is now support for Linux so progress is being made.


#41 : Posted by Dawn

Can you try out voip before getting rid of regular phone service landline ? To see if it's right for us ?

-> Response: Most providers have money back guarantees. A good option is to try it out but with a new phone number first and then when happy port over any existing numbers. Could save a lot of hassle.



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