Explanation of Latency Testing
Latency can be defined as being the delay between the time data packets composed of voice conversation are sent and when they are received. This usually occurs when there is a lack of bandwidth—or if a user’s network is over capacity. Latency can also occur as a result of distance, router delay, codec delay, and firewall delay. Firewall delay refers to the time it takes for a user’s firewall to inspect the data packets coming in.
Latency ultimately determines how long it will take users to receive packets of information. Measured in milliseconds, the official measurement has been termed as ping time. While this does not have as much of an impact on regular data such as emails or web pages, latency can greatly affect IP phone calls. Users should be sure that they are experiencing minimal latency, or low ping times, to ensure the optimization of their services. Ping time can generally be measured as such: Excellent: <100ms | Good: <250ms | Poor: >250ms
For a user to ensure that they are fully optimizing their services, one can administer a latency test. A latency test determines how long it takes to open a connection between the data center and a user’s email server. This test also informs users of how well their network is responding, and/or if the network is underperforming. Typically, this type of test will measure time in intervals of milliseconds, as that is the general measurement used.