I was able to make RingOut using the SDK on sandbox. My app just got approved on prod. I was able to authenticate the request, received both access token and refresh token. However, when I actually make the call, my VOIP phone never rang. The result from the RingOut request was:
{
"uri" : "https://platform.ringcentral.com/restapi/v1.0/account/2135929020/extension/355474035/ring-out/s-a7180ed0b0ee7z1875cd4e581zc192470000",
"id" : "s-a7180ed0b0ee7z1875cd4e581zc192470000",
"status" : {
"callStatus" : "InProgress",
"callerStatus" : "InProgress",
"calleeStatus" : "InProgress"
}
}