About -> Available Versions -> Release 1.9.x

OpenSIPS 1.9.0 is a stable stable release. It is recommended for production usage.

OpenSIPS 1.9.2 is the latest release from 1.9 branch.

OpenSIPS 1.9.2

Minor release (see Changelog from 1.9.1)
Release date: 12th of March 2014

OpenSIPS 1.9.1

Minor release (see Changelog from 1.9.0)
Release date: 8th of May 2013

OpenSIPS 1.9.0

Major release
Release date: 27th of February 2013.