There are two different types of Asterisk releases: Long Term Support and Standard. The type of release defines how long it will be supported. A Long Term Support release is fully supported for 4 years, with an additional year of maintenance for security fixes. Standard releases are supported for a shorter period of time; one year of full support and an additional year of maintenance for security fixes. Releases for these versions are generally made every six to eight weeks.
Certified Asterisk releases have undergone additional testing and are made less frequently – typically two to four times a year. Certified Asterisk releases are generally identical to the Long Term Support release they are based on, save for additional bug fixes that have been backported from the current mainline branch, and that were applied during testing.
Users new to Asterisk are encouraged to download the latest Long Term Support release, with the guidance that Certified Asterisk branches based on those releases have the least churn.
The following are the current supported Asterisk releases available for download:
