What type of Internet connection and bandwidth is required to ensure good voice quality?
To make and receive VoIP calls you need a high speed broadband Internet connection, the speed or bandwidth you require depends upon how many concurrent calls will be made and what codec your Internet telephone will use to digitise speech. You will need at least 80kbps on both the upload and download for a single two-way conversation using the G711 codec. The data rate for the G711 codec is 64kbps, but added to this will be headers and other information, adding up to an approximate total of 80kbps. Other codecs use higher compression ratios and can be used with lower bandwidth, like G729 and others. So for 10 concurrent calls using G711 you will need at least 800kbps broadband upload speed.
