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AM4378: Hands Free Ring Indication

Part Number: AM4378

Hello, I am using TI's Bluetooth stack (v 4.2.1.1.1.0) to implement a Hands Free Gateway. I can connect to a headset and get audio flowing, but I can't figure out how to get the ringing to work on the headset. I tried calling the function HFRM_Ring_Indication() but I still don't get any ringing on the BT headset. I have tried setting up the audio connection before sending a ring indication and I've also tried not setting up the audio connection beforehand and neither way has worked. I also tried calling the function HFRM_Enable_Remote_In_Band_Ring_Tone_Setting() and I still haven't had any success. Is there something that I am doing incorrectly? 

(My SDK version is 04.03.00.05)