The Asterisk 13 release is the first major update of the platform since Asterisk 12 in October of 2013. One of the big differences between Asterisk 13 and its immediate predecessor is that Asterisk 13 is a Long Term Support release, offering users four years of support.
Among the features included in Asterisk 13 is an improved security events framework. The Asterisk Manager Interface (AMI) is now integrated with security to alert administrators to security events. Alerts can be generated for invalid account ID access requests, authentication method errors and invalid passwords.