callState

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/microsoft.graph.callState",
  "title": "callState",
  "enum": [
    "incoming",
    "establishing",
    "established",
    "hold",
    "transferring",
    "transferAccepted",
    "redirecting",
    "terminating",
    "terminated",
    "unknownFutureValue"
  ],
  "type": "string"
}