The amount of bandwidth used depends on how much you use your telephone, as well as what codec you use on your VoIP device.

It also depends whether your Internet plan includes uploaded data (that is, data sent from your computer to the internet) as well as downloaded data (data that is received from the internet by your computer).

The following figures will help you determine how much usage is incurred:

Codec 1 minute 10 minutes 1 hour
G.729a 0.23 MB
2.3 MB
13.8 MB
G.711a
0.64 MB
6.4 MB
38.4 MB
G.711u
0.64 MB 6.4 MB 38.4 MB


NOTE: The above figures are for one way traffic. If your ISP includes uploads in your total usage, please multiply these figures by two.