We should document the minimum supported version of oFono on http://www.freedesktop.org/wiki/Software/PulseAudio/Download/ I don't know what the minimum supported version is. Someone should find out.
CC'ing Luiz for clarification on this.
Luiz thinks the minimum version is 1.13.
I just confirmed, the interfaces were added in 1.13: https://git.kernel.org/cgit/network/ofono/ofono.git/tree/ChangeLog
Wiki page updated.
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.