From TeleDynamic Communications:
Today, we’ll discuss latency.
What is Latency?VoIP latency is the delay between when the data packets of your voice conversation is sent and when it’s received. For most regular data like your email or when your downloading a webpage, a few microseconds of latency doesn’t impact your user experience. It doesn’t really matter that an email arrives a quarter of a second later or a website takes a moment longer to load.
Voice is DifferentBut voice is different. Voice is real time, for real. When you speak, you expect to be heard immediately. A delay of as a little as two tenths of a second, makes a voice conversation extremely challenging. The industry standard for acceptable latency for a Business VoIP conversation is only 120 milliseconds. This is less time than the blink of an eye at around 140 milliseconds! As a way of comparison, an old fashioned analog line has a latency of about 60 milliseconds and phone calls between cell phones can be up to 150 milliseconds. Cell phones have “trained” users that noticeable voice latency is a fact of modern life.
What are the Factors That Affect Latency?There are really 5 primary factors that affect latency in any business VoIP connection: More…