The number of concurrent calls is the number of calls made at the same time which will dictate the connection speed you require. Due to various audio codecs that can be used by VoIP phones the bandwidth usage can vary however generally per concurrent call 100 Kilo Bytes Per Second (Kbps) of upload and 100Kbps of download are required as a minimum. However a minimum upload and download of 5 Mbps+ is recommended.
Example:
| Number of Concurrent Calls | Minimum Required Bandwidth | Recommended Speed and Connection |
|---|---|---|
| 1 | 100 Kbps Upload and Download | 5 Mbps+ Upload and Download - DSL or better |
| 10 | 1 Mbps Upload and Download | 5 Mbps+ Upload and Download - DSL or better |
| 50 | 5 Mbps Upload and Download | 20 Mbps+ Upload and Download - FTTC or better |
| 100 | 10 Mbps Upload and Download | 30 Mbps+ Upload and Download - FTTC or better |
| 500 | 50 Mbps Upload and Download | 200 Mbps+ Upload and Download - FTTP or better |
If you are unsure of your usable network connection speed, free tools such as https://www.speedtest.net or https://wifiman.com can be used.
