VoIP Assessment Tool

We are firm believers that “if you do not measure it, you sure cannot manage it”.

Testing the quality of your internet connection is key to determining your success implementing VoIP service. This test tool provides a good benchmark in determining variations in your internet service as well as the evaluation of the circuit’s readiness for VoIP services.

This is a free service that is available to anyone.

Clicking this link will take you to the One Concurrent Call, Two Concurrent Calls, or Three Concurrent Calls test.

Our test resource is located at our colo which is located at 55 Marietta Street in Atlanta, GA.  The performance of this colo site is excellent, providing you a known good reference source.

For decades the telephone industry has used a measurement referred to as Mean Opinion Score (MOS).  It is truly an opinion that was arrived at by conducting tests in a controlled environment and asking the test subjects to rate the call quality.  VoIP uses the same scale but adds some additional factors. VoIP calls often are in the 4.0 to 4.4 MOS range.  The following chart can be used as a guide for your VoIP MOS test results.

Maximum for G.711 codec 4.4
Very satisfied 4.3-5.0
Satisfied 4.0-4.3
Some users satisfied 3.6-4.0
Many users dissatisfied 3.1-3.6
Nearly all users dissatisfied 2.6-3.1
Not recommended 1.0-2.6


Vartel’s VoIP assessment tool will evaluate the internet service for jitter, latency, and packet loss. Also the firewall, router, and LAN will be tested for the required open ports. When running this test, please allow adequate time for the test to completely run.  The test could take several minutes as we will be providing you a fairly large sample.

We recommend that you use IE browser and please make sure that JAVA is allowed as we load a small applet during the test. Also turn off Filtering as shown in the example below.

The following example is a Windstream DSL circuit that is working well until the very last hop to the DSL.  This demonstrates that any hop along the route can cause the call to lose quality. This is why the fewer hops the better with time sensitive services such as VoIP or Video. The example below has MOS of 1.o which is poor.

You will find the test link at the bottom of this page.

Clicking this link will take you to the One Concurrent Call, Two Concurrent Calls, or Three Concurrent Calls test. If you have any questions about the test please complete the form on the right or call us.  We are always happy to answer your questions.