MC60 Loud speaker output

We are using MC60 module, with firmware Revision: MC60CAR01A15. When the module is receiving call from any mobile phone Or when call is connected, we want to play Ring sound on loudspeaker. We have created below design based on MC60 hardware design manual, but I can not find example code to achieve this in OpenCPU RIL program. Please help.

Can anyone help with the answer of above?