Broadband Speed Test
Ensure you have adequate internet access
Internet access is a requirement for any VoIP service and the broadband pipe should be of a sufficient capacity to be able to service your voice and data requirements. Calculating the exact bandwidth required for a particular deployment is somewhat subjective - bandwidth can vary during the day, and internet use is typically bursty - however the information below can be used as a rough guide.
Due to the asymmetrical nature of many broadband technologies, we use the upstream bandwidth as the limiting factor for voice traffic. The table below shows the achievable voice channels and maximum recommended users for a variety of upstream bandwidths (the G.729a codec is assumed).
| Upstream |
Shared Connection |
Dedicated Connection |
| kbps |
Voice Channels |
Max users |
Voice Channels |
Max users |
| 768 |
5 |
13 |
15 |
40 |
| 640 |
4 |
10 |
12 |
30 |
| 512 |
3 |
8 |
10 |
26 |
| 384 |
3 |
5 |
7 |
18 |
| 256 |
2 |
3 |
5 |
12 |
| 128 |
1 |
1 |
1 |
1 |
- Voice channels represents the maximum recommended number of simultaneous calls
that can be made over the broadband pipe
- Max users is calculated based on a ratio of between 2 and 3:1 of users:voice channels
- Dedicated connection assumes no data / internet traffic on the broadband pipe
Test your connection
There are a number of services on the Internet that you can use to test your Internet connection speed. We recommend the following service: