nemomobile-packages/ofono — pull request #214 by marttipiirainen (2014-04-17 07:06:16+00:00)
Title: [voicecall] Inform client when local ringback tone is needed

In some networks, MO calls do not get the "alerting" tone in-band, so the device needs to play one locally.

This commit adds a "voice call agent" API - currently containing only the ringback tone notification but extendable later - and implements it in the rilmodem driver.