A new course titled Asterisk VOIP Essentials on Ubuntu 16.04 has just been released on Lecture Snippets. This course is the first course on the Asterisk software as well as Voice Over Internet Protocol (VOIP). Asterisk is the leading open source software that allows computers to be set up as a phone system. It is used by businesses worldwide.
This course is released under the free membership. A certification of completion is available upon completion of the course.