About -> Available Versions -> Release 1.6.x

OpenSIPS 1.6.x branch is outdated and not longer maintained, see current available releases.

OpenSIPS 1.6.1 is the last release from 1.6.x branch

1.  OpenSIPS 1.6.1

Minor release (see Changelog from 1.6.0)

2.  OpenSIPS 1.6.0

Major release