Asynchronous communication is communication taking place at different times or over a certain period of time.
Asynchronous communication is currently perhaps the most popular technology being used in online learning, and there are numerous packages and tools available.
Faculty wishing to use asynchronous communication in courses should check what their own institutions offer and what training is provided to operate them.
In telecommunication, an asynchronous communications system (start-stop system) is a data communications system that uses asynchronous operation.
In an asynchronous communications system, extra signal elements are usually appended to the data for the purpose of synchronizing individual data characters or blocks.
The time spacing between successive data characters or blocks may be of arbitrary duration.