I've been using Ring cameras to detect motion and doorbell activation long before the Ring Node server was created on Polyglot Cloud. This method still works.
1. Add the “Ring” skill to Alexa and say “Alexa, discover devices”. This will list all Ring cameras and the video doorbells as Alexa devices.
2. Using the ISY Portal, expose an ISY state variable to Alexa as a light. An Alexa light device can be set to a specific percentage value, which sets the state variable to the percentage value.
3. Use Alexa routines to set the percentage value of the light device corresponding to actions on the cameras (motion at camera X, doorbell button press, ...).
4. Write ISY programs that use the state variable as trigger.