public static void Dial(string callAddr, CallMode callMode) { log.Info("place call: callername:" + callAddr); int callHandleReference = 0; propertyManager.SetProperty(PropertyKey.CalleeAddr, callAddr); var errno = WrapperProxy.PlaceCall(callAddr, ref callHandleReference, callMode); if (errno != ErrorNumber.OK) { var errMsg = "Dial a Call failed. ErrorNum = " + errno; log.Error(errMsg); throw new Exception(errMsg); } }