![upload speed vs download speed upload speed vs download speed](https://i.ytimg.com/vi/tcGvwaKErow/maxresdefault.jpg)
NOTE: The upload and download speeds that your Internet service provider delivers vary over the course of time depending on many factors, such as the type of connection that you have and network congestion in your market area. To allow for quality and in the presence of extra features such as Busy Lamp Field, it is safer to assume that each phone you are using will need nearly 100 kbps of upstream and downstream bandwidth delivered consistently to and from your Internet service provider. The result will tell you the number of concurrent calls your connection can support. Divide the lower of the two numbers by 85, which is the amount (in kilobits per second or kbps) that each call will consume in both upload and download bandwidth. The speed test will report latency, download speed, and upload speed. NOTE: Latest versions of Adobe Flash Player and Java may be required to run the speed test in some browsers. Run this Speed Test to determine the bandwidth of your connection. A good rule is to plan to use 85% of your Internet connection’s advertised ability. This can result in latency, which will directly affect call quality.