Connection Test

The speed and latency of your Internet connection – important to check in case of problems.

Every now and then customers report in that all of a sudden the voice quality on their IP phones is not very good anymore while they did not change a thing. Most likely it is your Internet Speed or some hick-ups on your LAN or router. Use this connection test now.

  1. Check the excellent speedtest on
  2. After that, use the VoIP test simulating 3 VoIP calls with g711 codec – click here

Both tests will indicate if your Internet connection is good enough to carry VoIP calls.

Step 1 – Speedtest

XeloQ VoIP Speedtest - Connection Test for your Internet link 

After that compare that with the actual DSL information from your ISP.  You can find that in most DSL modem / routers at the Internet / DSL statistics page.

For instance, an AVM Frtitz!Box shows this:

XeloQ Fritzbox speed DSL - Connection test / speed for VoIP

In this example the maximum speed the actual line physically is in line with the speedtest results. There is always some overhead so the actual maximum speed is always lower.

Step 2 – use the VoIP simulation test
Use the VoIP test to simulate 3 VoIP calls with g711 codec – click here

You will see graphs like this (we already parsed to use 3 Voice calls / g711 codec; you can change that to the number of calls / codec needed):

XeloQ VoIP connection test - latency - packet loss - jitter - speed

And this if you click the VoIP tab:

XeloQ VoIP connection test - latency - packet loss - jitter - speed

What do to when the results are unsatisfying? 
You can do several things to improve the quality of your Internet connection so you get better VoIce call quality.

1.  upgrade the line speed – talk to your ISP
2.  try to get QoS (Quality of Service) enabled on your router / modem to prioritize VoIP traffic
3.  analyze what services / servers / PC’s  / email systems etc… eating all the bandwidth
     (maybe your colleague is watching Youtube videos or big up / downloads are in process)
4.  change the router / modem for a faster one
5.  do NOT let a Server / PC act as a firewall / router but use dedicated equipment for that
6.  avoid double NAT / LAN’s, Wifi interconnects with distortion and bad cabling
7.  use the right codec’s in you IP Phones / right packet sizes
8.  make sure if your ISP use vectoring / multiple VPC’s all is configured OK
9.  etc….

Some more background information about these tests:  click here

Still questions? Ask them through our support form and we will guide you through!

More help needed?
If you have still any more questions after consulting all support pages and our Blog, just let us know by returning the email we will send you after your support-request or through the Live Chat below on each webpage (only on availability of our employees). 


Want to buy a 1 hour remote support package?
If you really can not solve all the issues you experience on your local network and your VoIP equipment yourself, why don’t you buy yourself a 1 hour remote support-package? We just charge € 50,- for 1 hour and we will solve most VoIP / network issues within that hour. To buy it, click here!

Last but not least try our Facebook page & chat at – we might be able to help you there as well.

We’re here to help you!

Take care.
Support Team XeloQ IQ-Telephony