What kind of equipment are you using for connection to the Aux Ringer connection for Norstars? Especially for loud ringers for a shop area?

In the past I've used a dry contact interface (forget who makes it right now) connected to various loud ringers that sometimes weren't. I'd just like a loud bell ringer for certain extensions.

Thanks.
Jim

https://www.algosolutions.com/

Check out Algo and there Duet Ringer