In order to establish if your Internet connection is too slow for VoIP? You will need to consider two things.

  1. The type of internet connection you have.
  2. The bandwidth you are using to run your VoIP network.

There are two types of bandwidth at your location, upload and download bandwidth. The upload is the amount of data you can send to the Internet. Download speed is the rate at which data is transferred from the Internet to your computer. The higher your upload speed (Internet connection speed), the more achievable and effective the calls will be.

Typically, only a broadband Internet connection can provide the minimum bandwidth for VoIP calls. For the best call clarity, the minimum speed for VoIP phone calls is between 90 kbps (kilo bits per second) to 156 kbps at the other end of the VoIP speed spectrum. The bandwidth that your VoIP phone service requires depends on the number of concurrent calls you want to make.

The best way to determine your bandwidth, is to run a throughput test using a site like This will give you a basic idea of your current functional bandwidth,. It’s important to note that this can vary on exactly which applications you have running at any given time. This test also provides variable results depending on the location used for testing.

It is worth noting that your upload speed is often slower than your download speed. Which is why, you need to make sure that the lower number of the upload speed matches what you need.

Internet connection too slow for VoIP – Where To Start 

Naturally, the faster your connection, the better the quality is going to be. You may also find a faster connection lets you do more while you chat. For example: if you’re on a VoIP call, and your connection is very slow, we advise closing other applications that may use bandwidth. Otherwise, you could hear delays and noise on the line.

Our advice is to always run your VoIP phones were possible on a high-quality Internet connection. This should be at least 100 Kbps upload bandwidth available for each call in progress at the same time.

If you are running up to 3 or 4 phones and do choose to run your system on a basic broadband service which is also running your email and Internet browsing etc., we strongly recommend that you trial your VoIP phone before going live and be prepared to install a separate telephone line and broadband service if needed.

If you are considering implementing a VoIP telephone system into your business and would like some free independent advice on the best way to go about this, the please contact us now on 0345 389 2310. Alternatively, you can download our telephone systems buyers guide as useful reference material or even run a quick quote to obtain a budget cost for a new telephone system in less than 60 seconds.

To find out which type of phone system could work best in your business visit out telephone systems product page or even do a Quick Quote to find out the costs.