rilmodem/ofono — pull request #117 by jkangas (2014-09-09 11:07:19+00:00)
Title: Adding ringback tone event listening and notifying

This is part of change that solves

https://bugs.launchpad.net/ubuntu/+source/ofono/+bug/1341453

and potentially

https://bugs.launchpad.net/ubuntu/+source/ofono/+bug/1227199.

To fully solve the issue we need either bring https://github.com/nemomobile/tone-generator in or create something to listen the voice call agent.